When closing some top-level window, it's possible that ROOT's widget was deleted already and unregistered, but actual view/window was not still deleted; parent view wants children to re-paint (since other views were deleted) and if our view's drawRect method is now not able to find widget by Id (it was unregistered in ~TGWindow), do not generate warning message, drawRect is just noop.
When closing some top-level window, it's possible that ROOT's widget was deleted already and unregistered,
but actual view/window was not still deleted; parent view wants children to re-paint (since
other views were deleted) and if our view's drawRect method is now not able to find widget by Id (it was unregistered in ~TGWindow),
do not generate warning message, drawRect is just noop.


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@43839 27541ba8-7e3a-0410-8455-c3a389f83636

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