[PATCH 5/6] GLX: don't crash when indirect clients try to set an event mask

[Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>]

After sending the GLXChangeDrawableAttributes request, we also set a
local set of attributes on the DRI drawable.  But in the indirect case
this array won't be present, so skip the setting in that case to avoid a
crash.

Signed-off-by: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
---
 src/glx/glx_pbuffer.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
index 5f91bc6..ec54f1e 100644
--- a/src/glx/glx_pbuffer.c
+++ b/src/glx/glx_pbuffer.c
@@ -137,6 +137,9 @@ ChangeDrawableAttribute(Display * dpy, GLXDrawable drawable,
 #ifdef GLX_DIRECT_RENDERING
    pdraw = GetGLXDRIDrawable(dpy, drawable);
 
+   if (!pdraw)
+      return;
+
    for (i = 0; i < num_attribs; i++) {
       switch(attribs[i * 2]) {
       case GLX_EVENT_MASK:
-- 
1.7.4.1

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