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/BOOLEAN.h b/skeletons/BOOLEAN.h
index fd173d1..ec4dbac 100644
--- a/skeletons/BOOLEAN.h
+++ b/skeletons/BOOLEAN.h
@@ -7,6 +7,10 @@
 
 #include <asn_application.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /*
  * The underlying integer may contain various values, but everything
  * non-zero is capped to 0xff by the DER encoder. The BER decoder may
@@ -23,4 +27,8 @@
 xer_type_decoder_f BOOLEAN_decode_xer;
 xer_type_encoder_f BOOLEAN_encode_xer;
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif	/* _BOOLEAN_H_ */