workarounds for intel windows driver bugs


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1390 b412e182-2ed4-4078-95c4-27dc59f57fa9
intel bug workaround cleanups


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1391 b412e182-2ed4-4078-95c4-27dc59f57fa9
fix tabbing in glsl.cfg


git-svn-id: svn://svn.tuxfamily.org/svnroot/tesseract/main@1392 b412e182-2ed4-4078-95c4-27dc59f57fa9