Tweaked the #define's of GL_ALPHA_MIN_SGIX and GL_ALPHA_MAX_SGIX to ensure compilation across OGL drivers.
Tweaked the #define's of GL_ALPHA_MIN_SGIX and GL_ALPHA_MAX_SGIX to ensure compilation across
OGL drivers.


openscenegraph/osg,artoolkit/osg,openscenegraph/osg,tomasthoresen/osg,marchelbling/osg,artoolkit/osg,marchelbling/osg,scrawl/osg,tomasthoresen/osg,jtorresfabra/osg,openscenegraph/osg,scrawl/osg,openscenegraph/osg,scrawl/osg,artoolkit/osg,marchelbling/osg,tomasthoresen/osg,tomasthoresen/osg,jtorresfabra/osg,scrawl/osg,marchelbling/osg,jtorresfabra/osg,artoolkit/osg,jtorresfabra/osg