Fix transparency in skin icon

QPainter has a bug where drawing transparency to a freshly initialized, empty QPixmap causes garbage data to be drawn. This broke the rendering of the skin icon. The fix is simply to fill the QPixmap with empty transparent pixels beforehand.

Signed-off-by: maple! <averyrudelphe@gmail.com>

launcher/minecraft/auth/MinecraftAccount.cpp

@@ -126,6 +126,7 @@ QPixmap MinecraftAccount::getFace() const
         return QPixmap();
     }
     QPixmap skin = QPixmap(8, 8);
+    skin.fill(QColorConstants::Transparent);
     QPainter painter(&skin);
     painter.drawPixmap(0, 0, skinTexture.copy(8, 8, 8, 8));
     painter.drawPixmap(0, 0, skinTexture.copy(40, 8, 8, 8));