fix that stereo shutter glasses for nVidia setups did not engage. We lose the ability...

fix that stereo shutter glasses for nVidia setups did not engage. We lose the ability to have child windows as the WS_POPUP style doesn't play nice with them, but thats a small price to pay as we estimate them to be rare for stereo displays. Thanks Markus Israelsson

git-svn-id: svn+ssh://svn.code.sf.net/p/freeglut/code/trunk/freeglut/freeglut@1839 7f0cb862-5218-0410-a997-914c9d46530a