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/ObjectDescriptor.h b/skeletons/ObjectDescriptor.h
index 54a0000..fa1753e 100644
--- a/skeletons/ObjectDescriptor.h
+++ b/skeletons/ObjectDescriptor.h
@@ -7,8 +7,16 @@
 
 #include <GraphicString.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 typedef GraphicString_t ObjectDescriptor_t;  /* Implemented via GraphicString */
 
 extern asn_TYPE_descriptor_t asn_DEF_ObjectDescriptor;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif	/* _ObjectDescriptor_H_ */