[osg-users] Extension '' is not supported

[Robert Osfield]

I have just run the following:

$ osgviewer cow.osgt | grep "OpenGL extension '' is not supported"
OpenGL extension '' is not supported.
OpenGL extension '' is not supported.

So I get the odd warning.  It suggests that code somewhere is attempting to
to check an extension name that with an empty string.  I will have a quick
look.  It'll likely be benign issue.

Robert.
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