(svn r22932) -Fix [FS#4766]: disable the white border on window creation for several windows (based on patch by monoid)

src/main_gui.cpp

@@ -244,6 +244,7 @@ struct MainWindow : Window
 	MainWindow() : Window()
 	{
 		this->InitNested(&_main_window_desc, 0);
+		CLRBITS(this->flags4, WF_WHITE_BORDER_MASK);
 		ResizeWindow(this, _screen.width, _screen.height);
 
 		NWidgetViewport *nvp = this->GetWidget<NWidgetViewport>(MW_VIEWPORT);