Mesa (master): glx: Handle a null reply in QueryVersion.

[Stephane Marchesin]

Module: Mesa
Branch: master
Commit: 0256edd709d976198d5354fdd88143d8da9e51d5
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=0256edd709d976198d5354fdd88143d8da9e51d5

Author: Stéphane Marchesin <marcheu at chromium.org>
Date:   Thu May 24 17:58:53 2012 -0700

glx: Handle a null reply in QueryVersion.

Works around crashes when X connections break.

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

NOTE: This is a candidate for the 8.0 branch.

---

 src/glx/glxext.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/glx/glxext.c b/src/glx/glxext.c
index 12fff22..a4e76c1 100644
--- a/src/glx/glxext.c
+++ b/src/glx/glxext.c
@@ -293,6 +293,9 @@ QueryVersion(Display * dpy, int opcode, int *major, int *minor)
                                                                        GLX_MINOR_VERSION),
                                                                       NULL);
 
+   if (!reply)
+     return GL_FALSE;
+
    if (reply->major_version != GLX_MAJOR_VERSION) {
       free(reply);
       return GL_FALSE;