Mesa (master): glx: Ignore DRI2 event for drawables we've destroyed

[Kristian Høgsberg]

Module: Mesa
Branch: master
Commit: f24ec6367b1cf6c6822fa998df8a877288711427
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f24ec6367b1cf6c6822fa998df8a877288711427

Author: Kristian Høgsberg <krh at bitplanet.net>
Date:   Wed Sep  8 18:54:30 2010 -0400

glx: Ignore DRI2 event for drawables we've destroyed

Since we now actually destroy GLX drawables, we get into situations where
we get events for drawables that no longer exist.  Just ignore the
event in that case.

---

 src/glx/dri2.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/glx/dri2.c b/src/glx/dri2.c
index d410898..30999c8 100644
--- a/src/glx/dri2.c
+++ b/src/glx/dri2.c
@@ -103,7 +103,7 @@ DRI2WireToEvent(Display *dpy, XEvent *event, xEvent *wire)
 
       /* Ignore swap events if we're not looking for them */
       pdraw = dri2GetGlxDrawableFromXDrawableId(dpy, awire->drawable);
-      if (!(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
+      if (!pdraw || !(pdraw->eventMask & GLX_BUFFER_SWAP_COMPLETE_INTEL_MASK))
 	 return False;
 
       aevent->serial = _XSetLastRequestRead(dpy, (xGenericReply *) wire);