[PULL] DRI2 fixes and extensions

[Pauli Nieminen]

The following changes since commit a52efb096e166e325deb3d6b502671f339a4fa15:
  Keith Packard (1):
        Merge remote branch 'sthibaul/master-iopl'

are available in the git repository at:

  ssh://people/~suokko/xserver.git dri2_patches

Pauli Nieminen (5):
      DRI2: Avoid call to NULL pointer
      DRI2: Add error message when working around driver bug
      DRI2: Add ReuseBufferNotify hook
      DRI2: Expose API to set drawable swap limit.
      DRI2: Allow DDX to validate swap_limit changes

 hw/xfree86/dri2/dri2.c |   63 ++++++++++++++++++++++++++++++++++++++++++++----
 hw/xfree86/dri2/dri2.h |   31 ++++++++++++++++++++++-
 2 files changed, 88 insertions(+), 6 deletions(-)