Changing drv_invoke to drv_call_function

Source/Integration/IntegrationGameModeBase.h

@@ -53,7 +53,7 @@ public:
 	//
 	void LuaCallBegin() { LuaCallBuffer.clear(); }
 	FlxStreamBuffer &LuaCallGetBuffer() { return LuaCallBuffer; }
-	void LuaCallInvoke(bool background);
+	void LuaCallInvoke(AActor *place);
 
 	// Execute a debugging command, typed on the GUI.
 	void ExecuteDebuggingCommand(FlxLockedWrapper &w, const FString &fs);