Mesa (master): python: Don't try to finish a null fence.

[Jose Fonseca]

Module: Mesa
Branch: master
Commit: c89eba0f31623084bc754de724384c80a3e57c91
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=c89eba0f31623084bc754de724384c80a3e57c91

Author: José Fonseca <jfonseca at vmware.com>
Date:   Wed Apr  8 21:11:51 2009 +0100

python: Don't try to finish a null fence.

---

 src/gallium/state_trackers/python/p_context.i |    8 +++++---
 1 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/gallium/state_trackers/python/p_context.i b/src/gallium/state_trackers/python/p_context.i
index 9a3003a..a40aa1e 100644
--- a/src/gallium/state_trackers/python/p_context.i
+++ b/src/gallium/state_trackers/python/p_context.i
@@ -258,9 +258,11 @@ error1:
    flush(unsigned flags = 0) {
       struct pipe_fence_handle *fence = NULL; 
       $self->pipe->flush($self->pipe, flags | PIPE_FLUSH_RENDER_CACHE, &fence);
-      /* TODO: allow asynchronous operation */ 
-      $self->pipe->screen->fence_finish( $self->pipe->screen, fence, 0 );
-      $self->pipe->screen->fence_reference( $self->pipe->screen, &fence, NULL );
+      if(fence) {
+         /* TODO: allow asynchronous operation */ 
+         $self->pipe->screen->fence_finish( $self->pipe->screen, fence, 0 );
+         $self->pipe->screen->fence_reference( $self->pipe->screen, &fence, NULL );
+      }
    }
 
    /*