Hi,
if testgl is run using ‘testgl -twice -logo’ then, when the window is
opened the second time, the logo is displayed as a blue square instead
of the happy-face.
This happens on win32 and X and is because the OpenGL texture isn’t
recreated (or bound?) the second time.
The enclosed patch fixes the problem but the example code is creaking at
the seams a bit 
cheers,
John.
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