Mesa (master): dri2: check if context is valid before flushing the pipe

[Cooper Yuan]

Module: Mesa
Branch: master
Commit: f272117def7a7962f355581d038af6d0981a23cb
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=f272117def7a7962f355581d038af6d0981a23cb

Author: Cooper Yuan <cooperyuan at gmail.com>
Date:   Tue Aug 16 20:37:13 2011 +0800

dri2: check if context is valid before flushing the pipe

---

 src/gallium/state_trackers/dri/drm/dri2.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/src/gallium/state_trackers/dri/drm/dri2.c b/src/gallium/state_trackers/dri/drm/dri2.c
index 908a735..53638da 100644
--- a/src/gallium/state_trackers/dri/drm/dri2.c
+++ b/src/gallium/state_trackers/dri/drm/dri2.c
@@ -49,7 +49,8 @@ dri2_flush_drawable(__DRIdrawable *draw)
    struct dri_drawable *drawable = dri_drawable(draw);
    struct dri_context *ctx = dri_get_current(draw->driScreenPriv);
 
-   ctx->st->flush(ctx->st, 0, NULL);
+   if (ctx)
+      ctx->st->flush(ctx->st, 0, NULL);
 }
 
 static void