Fixes the TD process hanging when pressing 'exit game'

Author: tore29

tiberiandawn/startup.cpp

@@ -467,16 +467,27 @@ int main(int argc, char** argv)
         Memory_Error_Exit = Print_Error_Exit;
 
         CCDebugString("C&C95 - About to exit.\n");
-        ReadyToQuit = 1;
 
 #if defined(SDL_BUILD)
         Reset_Video_Mode();
 #endif
 
         Sound_End();
 
-#if defined(_WIN32)
-        PostMessageA(MainWindow, WM_DESTROY, 0, 0);
+        /*
+        ** Flag that this is a clean shutdown (not killed with Ctrl-Alt-Del)
+        */
+        ReadyToQuit = 1;
+
+        /*
+        ** Post a message to our message handler to tell it to clean up.
+        */
+#if defined(_WIN32) && !defined(SDL_BUILD)
+        PostMessage(MainWindow, WM_DESTROY, 0, 0);
+
+        /*
+        ** Wait until the message handler has dealt with the message
+        */
         do {
             Keyboard->Check();
         } while (ReadyToQuit == 1);
@@ -598,4 +609,4 @@ void Read_Setup_Options(RawFileClass* config_file)
     */
     VideoBackBufferAllowed = ini.Get_Bool("Options", "VideoBackBuffer", true);
     AllowHardwareBlitFills = ini.Get_Bool("Options", "HardwareFills", true);
-}
+}