Restart the frame timer immediately

This marks the timer as started again, before we call out to various
external places that might be confused by the frame timer reporting that
it is stopped.

common/rfb/VNCServerST.cxx

@@ -637,13 +637,13 @@ void VNCServerST::handleTimeout(Timer* t)
     if (comparer->is_empty())
       return;
 
+    // If this is the first iteration then we need to adjust the timeout
+    frameTimer.repeat(1000/rfb::Server::frameRate);
+
     writeUpdate();
 
     msc++;
     desktop->frameTick(msc);
-
-    // If this is the first iteration then we need to adjust the timeout
-    frameTimer.repeat(1000/rfb::Server::frameRate);
   } else if (t == &idleTimer) {
     slog.info("MaxIdleTime reached, exiting");
     desktop->terminate();