added extern C crap

git-svn-id: http://svn.openzap.org/svn/openzap/branches/sangoma_boost@880 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/freetdm/src/include/hashtable.h

@@ -9,6 +9,9 @@
 #endif
 #include "openzap.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 struct hashtable;
 struct hashtable_iterator;
 
@@ -181,6 +184,10 @@ OZ_DECLARE(struct hashtable_iterator*) hashtable_first(struct hashtable *h);
 OZ_DECLARE(struct hashtable_iterator*) hashtable_next(struct hashtable_iterator *i);
 OZ_DECLARE(void) hashtable_this(struct hashtable_iterator *i, const void **key, int *klen, void **val);
 
+#ifdef __cplusplus
+} /* extern C */
+#endif
+
 #endif /* __HASHTABLE_CWC22_H__ */
 
 /*