silence windows warning

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@5740 d0543943-73ff-0310-b7d9-9358b9ac24b2

libs/sofia-sip/libsofia-sip-ua/url/sofia-sip/url.h

@@ -204,7 +204,7 @@ SOFIAPUBFUN char *url_unescape(char *d, char const *s);
  * @endcode
  */
 #define URL_INIT_AS(type)  \
-  { "\0\0", url_##type, 0, url_##type != url_any ? #type : "*" }
+{ { 0 }, url_##type, 0, url_##type != url_any ? #type : "*" }
 
 /** Init a url structure as given type */
 SOFIAPUBFUN void url_init(url_t *url, enum url_type_e type);