added check for icon existance in bool GLXGLSupport (transplanted from 749f2077cec036037e11464cc967572ba5e63056)
added check for icon existance in bool GLXGLSupport
(transplanted from 749f2077cec036037e11464cc967572ba5e63056)

vbudovski/ogre,vbudovski/ogre,vbudovski/ogre,vbudovski/ogre,vbudovski/ogre