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/NativeInteger.h b/skeletons/NativeInteger.h
index b66d29a..f38fd47 100644
--- a/skeletons/NativeInteger.h
+++ b/skeletons/NativeInteger.h
@@ -15,6 +15,10 @@
 #include <asn_application.h>
 #include <INTEGER.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern asn_TYPE_descriptor_t asn_DEF_NativeInteger;
 
 asn_struct_free_f  NativeInteger_free;
@@ -24,4 +28,8 @@
 xer_type_decoder_f NativeInteger_decode_xer;
 xer_type_encoder_f NativeInteger_encode_xer;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif	/* _NativeInteger_H_ */