nua_common.c: fixed doxy of _NUA_DEBUG_HANDLE environment variable.

darcs-hash:20060821161119-65a35-224a3ed55ce57f27cdbddef3aa61eaaf6d87beb1.gz

libsofia-sip-ua/nua/nua_common.c

@@ -196,7 +196,7 @@ nua_handle_t *nh_create_handle(nua_t *nua, nua_hmagic_t *hmagic,
  *
  * @sa nua_handle(), nua_handle_destroy()
  */
-extern char const NUA_DEBUG[];
+extern char const _NUA_HANDLE_DEBUG[];
 
 /* nua handle destructor. It does nothing. */
 static void nh_destructor(void *arg)