st/glx/xlib: check for null ctx pointer in glXIsDirect()

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=64745
Note: This is a candidate for the stable branches.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

diff --git a/src/gallium/state_trackers/glx/xlib/glx_api.c b/src/gallium/state_trackers/glx/xlib/glx_api.c
index 88f58863fffb8b36397de7ec3bc2b25b9bd9e1ca..a66ebc8e8a41c76bbc62ee8a51860dae68155fb5 100644 (file)
--- a/src/gallium/state_trackers/glx/xlib/glx_api.c
+++ b/src/gallium/state_trackers/glx/xlib/glx_api.c
@@ -1369,9 +1369,7 @@ glXDestroyContext( Display *dpy, GLXContext ctx )
 PUBLIC Bool
 glXIsDirect( Display *dpy, GLXContext ctx )
 {
-   GLXContext glxCtx = ctx;
-   (void) ctx;
-   return glxCtx->isDirect;
+   return ctx ? ctx->isDirect : False;
 }