extern "C" used in skeletons


git-svn-id: https://asn1c.svn.sourceforge.net/svnroot/asn1c/trunk@943 59561ff5-6e30-0410-9f3c-9617f08c8826
diff --git a/skeletons/constr_CHOICE.h b/skeletons/constr_CHOICE.h
index ea32467..859c532 100644
--- a/skeletons/constr_CHOICE.h
+++ b/skeletons/constr_CHOICE.h
@@ -7,6 +7,10 @@
 
 #include <asn_application.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef struct asn_CHOICE_specifics_s {
 	/*
 	 * Target structure description.
@@ -40,4 +44,8 @@
 xer_type_encoder_f CHOICE_encode_xer;
 asn_outmost_tag_f CHOICE_outmost_tag;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif	/* _CONSTR_CHOICE_H_ */