csn1: Fix pedantic compiler warnings in csn.1 dissectors

Port of wireshark.git commit 6aca10831f86c562970b13efa811f46e25ee3091.

    From Mike Morrin:
    Fix pedantic compiler warnings in csn.1 dissectors.

    There is some tricky casting going on in csn.1 structures.  To eliminate all
    the warnings, the function pointers needed to be moved out of the object
    pointer unions.  Fortunately macros (mostly) hide these changes from the
    protocol dissector tables.

    https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=7686

    svn path=/trunk/; revision=44899

Change-Id: Ia1a8c50c4b024ca6df4e3fbbf891cd33591ccc9b
diff --git a/src/csn1.cpp b/src/csn1.cpp
index 8e123fb..493d471 100644
--- a/src/csn1.cpp
+++ b/src/csn1.cpp
@@ -335,7 +335,7 @@
         guint8  no_of_bits  = (guint8) pDescr->i;
         guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
 
-        if (pDescr->serialize.value != 0)
+        if (pDescr->format_p.value != 0)
         { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
           nCount = *pui16DATA(data, nCount);
         }
@@ -382,7 +382,7 @@
         gint16      Status;
         csnStream_t arT    = *ar;
         gint16      nCount = pDescr->i;
-        guint16      nSize  = (guint16)(gint32)pDescr->serialize.value;
+        guint16      nSize  = (guint16)(gint32)pDescr->format_p.value;
 
         pui8 = pui8DATA(data, pDescr->offset);
         if (pDescr->type == CSN_VARIABLE_TARRAY)
@@ -539,7 +539,7 @@
 
       case CSN_SERIALIZE:
       {
-        StreamSerializeFcn_t serialize = pDescr->serialize.fcn;
+        StreamSerializeFcn_t serialize = (StreamSerializeFcn_t)pDescr->aux_fn;
         csnStream_t          arT       = *ar;
         guint8 length_len              = pDescr->i;
         gint16               Status    = -1;
@@ -762,7 +762,7 @@
             guint8  no_of_bits  = (guint8) pDescr->i;
             guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
 
-            if (pDescr->serialize.value != 0)
+            if (pDescr->format_p.value != 0)
             { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
               nCount = *pui16DATA(data, nCount);
             }
@@ -821,7 +821,7 @@
             gint16      Status;
             csnStream_t arT    = *ar;
             guint16      nCount = (guint16) pDescr->i;
-            guint16      nSize  = (guint16)(guint32)pDescr->serialize.value;
+            guint16      nSize  = (guint16)(guint32)pDescr->format_p.value;
 
             pui8  = pui8DATA(data, pDescr->offset);
 
@@ -1264,7 +1264,7 @@
          *  M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
          * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE)}
          */
-        gint16 nSizeElement = (gint16)(gint32)pDescr->serialize.value;
+        gint16 nSizeElement = (gint16)(gint32)pDescr->format_p.value;
         guint8  ElementCount = 0;
         pui8  = pui8DATA(data, pDescr->offset);
 
@@ -1327,7 +1327,7 @@
          * M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
          * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE)}
          */
-        gint16      nSizeElement = (gint16)(gint32)pDescr->serialize.value;
+        gint16      nSizeElement = (gint16)(gint32)pDescr->format_p.value;
         guint8       ElementCount = 0;
         csnStream_t arT          = *ar;
         gboolean     EndOfList    = FALSE;
@@ -1608,7 +1608,7 @@
         guint8  no_of_bits  = (guint8) pDescr->i;
         guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
 
-        if (pDescr->serialize.value != 0)
+        if (pDescr->format_p.value != 0)
         { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
           nCount = *pui16DATA(data, nCount);
         }
@@ -1655,7 +1655,7 @@
         gint16      Status;
         csnStream_t arT    = *ar;
         gint16      nCount = pDescr->i;
-        guint16     nSize  = (guint16)(gint32)pDescr->serialize.value;
+        guint16     nSize  = (guint16)(gint32)pDescr->format_p.value;
 
         pui8 = pui8DATA(data, pDescr->offset);
         if (pDescr->type == CSN_VARIABLE_TARRAY)
@@ -1801,7 +1801,7 @@
 
    case CSN_SERIALIZE:
       {
-        StreamSerializeFcn_t serialize = pDescr->serialize.fcn;
+        StreamSerializeFcn_t serialize = (StreamSerializeFcn_t)pDescr->aux_fn;
         csnStream_t          arT       = *ar;
         guint8 length_len              = pDescr->i;
         gint16               Status = -1;
@@ -2025,7 +2025,7 @@
             guint8  no_of_bits  = (guint8) pDescr->i;
             guint16 nCount = (guint16)pDescr->descr.value; /* nCount supplied by value i.e. M_UINT_ARRAY(...) */
 
-            if (pDescr->serialize.value != 0)
+            if (pDescr->format_p.value != 0)
             { /* nCount specified by a reference to field holding value i.e. M_VAR_UINT_ARRAY(...) */
               nCount = *pui16DATA(data, nCount);
             }
@@ -2072,7 +2072,7 @@
             gint16      Status;
             csnStream_t arT    = *ar;
             gint16      nCount = pDescr->i;
-            guint16     nSize  = (guint16)(gint32)pDescr->serialize.value;
+            guint16     nSize  = (guint16)(gint32)pDescr->format_p.value;
 
             pui8 = pui8DATA(data, pDescr->offset);
             if (pDescr->type == CSN_VARIABLE_TARRAY)
@@ -2517,7 +2517,7 @@
          *  M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
          * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE)}
          */
-        gint16 nSizeElement = (gint16)(gint32)pDescr->serialize.value;
+        gint16 nSizeElement = (gint16)(gint32)pDescr->format_p.value;
         guint8  ElementCount = 0;
         pui8  = pui8DATA(data, pDescr->offset);
         /* Store the counted number of elements of the array */
@@ -2579,7 +2579,7 @@
          * M_REC_TARRAY(_STRUCT, _MEMBER, _MEMBER_TYPE, _ElementCountField)
          * {t, offsetof(_STRUCT, _ElementCountField), (void*)CSNDESCR_##_MEMBER_TYPE, offsetof(_STRUCT, _MEMBER), #_MEMBER, (StreamSerializeFcn_t)sizeof(_MEMBER_TYPE)}
          */
-        gint16      nSizeElement = (gint16)(gint32)pDescr->serialize.value;
+        gint16      nSizeElement = (gint16)(gint32)pDescr->format_p.value;
         guint8      ElementCount = 0;
         guint8      ElementNum   = 0;
         csnStream_t arT          = *ar;