remote_daemon_dispatch: Don't leak @ret on failure

If there's a problem in encoding @ret (for instance
virTypedParamsSerialize() fails) then @ret is leaked.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>

src/remote/remote_daemon_dispatch.c

@@ -7025,8 +7025,11 @@ remoteDispatchConnectGetAllDomainStats(virNetServerPtr server ATTRIBUTE_UNUSED,
     rv = 0;
 
  cleanup:
-    if (rv < 0)
+    if (rv < 0) {
         virNetMessageSaveError(rerr);
+        xdr_free((xdrproc_t)xdr_remote_connect_get_all_domain_stats_ret,
+                 (char *) ret);
+    }
 
     virDomainStatsRecordListFree(retStats);
     virObjectListFree(doms);