iOS: Guard QIOSScreen against notifying Qt about changes to deleted QScreens

Now that we can rely on screen() returning 0 when the QScreen is not
available we can return early from updateProperties(). We still compute
the member variables as they may be accessed directly for the still
alive QPlatformScreen.

Change-Id: Ia7d0d29a6b50a9c932b565dc53b23d66331c275e
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@theqtcompany.com>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@theqtcompany.com>

0 files changed, 0 insertions, 0 deletions