Mesa (master): dri2: protect dri2FlushFrontBuffer against NULL buffers.

[Stephane Marchesin]

Module: Mesa
Branch: master
Commit: 3d3ecb8520ccca0863026a94e7fda9840aff6c0a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3d3ecb8520ccca0863026a94e7fda9840aff6c0a

Author: Stéphane Marchesin <marcheu at chromium.org>
Date:   Fri Jun  3 17:03:09 2011 -0700

dri2: protect dri2FlushFrontBuffer against NULL buffers.

---

 src/glx/dri2_glx.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 69b47ae..506754c 100644
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -457,6 +457,12 @@ static void
 dri2FlushFrontBuffer(__DRIdrawable *driDrawable, void *loaderPrivate)
 {
    struct dri2_drawable *pdraw = loaderPrivate;
+   if (!pdraw)
+      return;
+
+   if (!pdraw->base.psc)
+      return;
+
    struct glx_display *priv = __glXInitialize(pdraw->base.psc->dpy);
    struct dri2_display *pdp = (struct dri2_display *)priv->dri2Display;
    struct glx_context *gc = __glXGetCurrentContext();