Added missing file from last commit

juce_amalgamated.cpp

@@ -253515,7 +253515,7 @@ void MessageManager::doPlatformSpecificShutdown()
     }
 }
 
-bool juce_postMessageToSystemQueue (Message* message)
+bool juce_postMessageToSystemQueue (void* message)
 {
     if (errorCondition)
         return false;