* Do not update the internal window state in case sending the message failed.

* This is not perfect, but it makes Tracker catch up and redraw when the next
  event is due. This improves the situation in bug #2212.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25708 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/servers/app/Window.cpp

@@ -1839,7 +1839,12 @@ Window::_SendUpdateMessage()
 		return;
 
 	BMessage message(_UPDATE_);
-	ServerWindow()->SendMessageToClient(&message);
+	if (ServerWindow()->SendMessageToClient(&message) != B_OK) {
+		// If sending the message failed, we'll just keep adding to the dirty
+		// region until sending was successful.
+		// TODO: we might want to automatically resend this message in this case
+		return;
+	}
 
 	fUpdateRequested = true;
 	fEffectiveDrawingRegionValid = false;