sys/glsink/: Add vblank synchronization.  Isn't really working on my driver. :(

Original commit message from CVS:
* sys/glsink/Makefile.am:
* sys/glsink/glextensions.c:
* sys/glsink/glextensions.h:
* sys/glsink/glvideo.c:
Add vblank synchronization.  Isn't really working on my
driver. :(
5 files changed