From Timur:
From Timur:

- small fix for "ogle" option in pad (if canvas does not support
  OpenGL, we cannot create gl embedded viewer)


git-svn-id: acec3fd5b7ea1eb9e79d6329d318e8118ee2e14f@13654 27541ba8-7e3a-0410-8455-c3a389f83636

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