Fix a memory leak in tor-resolve.c

Closes bug 30151/coverity CID 1441830. Bugfix on 0.4.0.1-alpha when
we started doing trunnel parsing in tor-resolve.c.

src/tools/tor-resolve.c

@@ -424,6 +424,7 @@ do_resolve(const char *hostname,
     if (parsed < 2) {
       log_err(LD_NET, "Failed to parse SOCKS5 method selection "
                       "message");
+      socks5_server_method_free(m);
       goto err;
     }