cmake: remove useless line that failed to build on older cmake version


git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5577 96395faa-99c1-11dd-bbfe-3dabce05a288
zzogl-pg: use the red channel instead of the alpha channel for the block data. Alpha channel isn't supported (normally) in OGL3 and later.


git-svn-id: http://pcsx2.googlecode.com/svn/trunk@5578 96395faa-99c1-11dd-bbfe-3dabce05a288