fix missing parens

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@15384 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/mod/applications/mod_curl/mod_curl.c

@@ -185,7 +185,7 @@ static char *print_json(switch_memory_pool_t *pool, http_data_t *http_data) {
 			*data = '\0';
 		}
 		
-		if zstr(header->data) {
+		if (zstr(header->data)) {
 			header = header->next;
 			continue;
 		}