performance impact with either glxgears or the launch feedback icon,
so KWIN_NVIDIA_HACK=1 is the default again.
CCMAIL: kwin@kde.org
svn path=/trunk/KDE/kdebase/workspace/; revision=787993
- setting LIBGL_ALWAYS_INDIRECT=1, as that seems to be required for texture_from_pixmap
to work with AIGLX
- setting __GL_YIELD=NOTHING to noticeably improve smoothness with nVidia
svn path=/trunk/KDE/kdebase/workspace/; revision=749631
