mesa: Clear cache->trans after destroying the transfer.

diff --git a/src/mesa/state_tracker/st_cb_bitmap.c b/src/mesa/state_tracker/st_cb_bitmap.c
index f77ac14..eecedc2 100644 (file)
--- a/src/mesa/state_tracker/st_cb_bitmap.c
+++ b/src/mesa/state_tracker/st_cb_bitmap.c
@@ -624,6 +624,7 @@ st_flush_bitmap_cache(struct st_context *st)
          cache->buffer = NULL;
 
          screen->tex_transfer_destroy(cache->trans);
+         cache->trans = NULL;
 
          draw_bitmap_quad(st->ctx,
                           cache->xpos,