Only send get_updates_xhr error if we don't have a timeout either.

(imported from commit b77c6c67917f8d2bc5d59fb46f3a5ffa4a0ac443)

static/js/compose.js

@@ -477,7 +477,7 @@ function send_message(request) {
     } else {
         send_message_ajax(request, success);
     }
-    if (get_updates_xhr === undefined) {
+    if (get_updates_xhr === undefined && get_updates_timeout === undefined) {
         restart_get_updates({dont_block: true});
         blueslip.error("Restarting get_updates because it was not running during send");
     }

tools/jslint/check-all.js

@@ -62,7 +62,7 @@ var globals =
     + ' send_summarize_in_stream'
     + ' suppress_unread_counts'
     + ' msg_metadata_cache'
-    + ' get_updates_xhr'
+    + ' get_updates_xhr get_updates_timeout'
     ;