xmlrpc: clean allocated buffer for reply when no more memory for reas…

…on value

(cherry picked from commit 36a4b16)
(cherry picked from commit aa875e2)
(cherry picked from commit 1ccb215)

src/modules/xmlrpc/xmlrpc.c

@@ -2489,7 +2489,7 @@ static int ki_xmlrpc_reply(sip_msg_t* msg, int rcode, str* reason)
 	reply.reason = as_asciiz(reason);
 	if (reply.reason == NULL) {
 		ERR("No memory left\n");
-		return -1;
+		goto error;
 	}
 
 	if (reply.code >= 300) {