library/GSM_RR_Types.ttcn: fix: work around TITAN bug 562488

Commit [1] introduced multiple regressions, because it basically
changed the byte order in all fields of the whole module from
'first' (implicit default) to 'last'. This is not what we need.

Instead, let's apply BYTEORDER(last) to 5 bit 'ext_ra' fields
unless the bug [2] in TITAN's RAW codec is fixed.

[1] I481a40daef3eed4a3daa687ad87c4128a13181b4
[2] https://bugs.eclipse.org/bugs/show_bug.cgi?id=562488

Change-Id: If998ef72c13787f04fee79e1e646cd9a6787028a
Signed-off-by: Vadim Yanitskiy <axilirator@gmail.com>
diff --git a/library/GSM_RR_Types.ttcn b/library/GSM_RR_Types.ttcn
index 6e359ab..dcf12ae 100644
--- a/library/GSM_RR_Types.ttcn
+++ b/library/GSM_RR_Types.ttcn
@@ -194,10 +194,7 @@
 	type record LocationAreaIdentification {
 		BcdMccMnc	mcc_mnc,
 		uint16_t	lac
-	} with {
-		/* Otherwise '262F45'H is encoded as '24F262'H */
-		variant (mcc_mnc) "BYTEORDER(first)"
-	};
+	} with { variant "" };
 
 	/* TS 24.008 10.5.1.4 */
 	type enumerated MobileIdentityType {
@@ -412,6 +409,8 @@
 		variant (r99) "CSN.1 L/H"
 		variant (presence) "PRESENCE(r99 = '1'B)" /* H */
 		variant (ext_ra) "PRESENCE(presence = '1'B)"
+		/* See https://bugs.eclipse.org/bugs/show_bug.cgi?id=562488 */
+		variant (ext_ra) "BYTEORDER(last)" // FIXME: should be first
 	};
 	type union PacketUlDlAssignUnion {
 		PacketUlAssign		ul,
@@ -634,6 +633,8 @@
 		variant (ats)	"PRESENCE(ats_present = '1'B)"
 		variant (dynamic)	"PRESENCE(presence = '1'B)"
 		variant (multiblock)	"PRESENCE(presence = '0'B)"
+		/* See https://bugs.eclipse.org/bugs/show_bug.cgi?id=562488 */
+		variant (ext_ra) "BYTEORDER(last)" // FIXME: should be first
 	};
 
 	type octetstring MblkDlAss;	/* TODO */
@@ -1064,4 +1065,4 @@
 		}
 	};
 
-} with { encode "RAW" ; variant "FIELDORDER(msb)" variant "BYTEORDER(last)" }
+} with { encode "RAW" ; variant "FIELDORDER(msb)" }