Windows: distinguish left and right modifiers

This is just some workaround until we either use a different input api for keyboards or until we refactor the keyboard_pad_handler to use Qt with native scan codes

rpcs3/rpcs3qt/gs_frame.cpp

@@ -106,8 +106,8 @@ void gs_frame::showEvent(QShowEvent *event)
 {
 	// we have to calculate new window positions, since the frame is only known once the window was created
 	// the left and right margins are too big on my setup for some reason yet unknown, so we'll have to ignore them
-	int x = geometry().left(); //std::max(geometry().left(), frameMargins().left());
-	int y = std::max(geometry().top(), frameMargins().top());
+	const int x = geometry().left(); //std::max(geometry().left(), frameMargins().left());
+	const int y = std::max(geometry().top(), frameMargins().top());
 
 	setPosition(x, y);