Check new timer before [MMBackend waitForInput:]

src/MacVim/gui_macvim.m

@@ -431,7 +431,16 @@ gui_mch_wait_for_chars(int wtime)
     [[MMBackend sharedInstance] flushQueue:YES];
 
 #ifdef MESSAGE_QUEUE
+# ifdef FEAT_TIMERS
+    did_add_timer = FALSE;
+# endif
+
     parse_queued_messages();
+
+# ifdef FEAT_TIMERS
+    if (did_add_timer)
+        wtime = 0;
+# endif
 #endif
 
     return [[MMBackend sharedInstance] waitForInput:wtime];