svga: do not emulate wide points in GS when doing transform feedback

Emulating wide points in geometry shader when doing transform feedback
is problematic. This patch disables the emulation.

Tested with piglit test ext_transform_feedback-points.
Also tested with MTT glretrace, mesa demos pointblast and spriteblast.

Reviewed-by: Brian Paul <brianp@vmware.com>
1 file changed