Mesa (master): r300g: Avoid segfault on binding null RS state.

[Corbin Simpson]

Module: Mesa
Branch: master
Commit: 22d615a9c4b95c528d6604eccb71cf6fe5193d5a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=22d615a9c4b95c528d6604eccb71cf6fe5193d5a

Author: Corbin Simpson <MostAwesomeDude at gmail.com>
Date:   Mon Jan 11 20:27:54 2010 -0800

r300g: Avoid segfault on binding null RS state.

---

 src/gallium/drivers/r300/r300_state.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/src/gallium/drivers/r300/r300_state.c b/src/gallium/drivers/r300/r300_state.c
index 78764dd..4c22d4e 100644
--- a/src/gallium/drivers/r300/r300_state.c
+++ b/src/gallium/drivers/r300/r300_state.c
@@ -717,7 +717,11 @@ static void r300_bind_rs_state(struct pipe_context* pipe, void* state)
         draw_set_rasterizer_state(r300->draw, &rs->rs);
     }
 
-    r300->tcl_bypass = rs->rs.bypass_vs_clip_and_viewport;
+    if (rs) {
+        r300->tcl_bypass = rs->rs.bypass_vs_clip_and_viewport;
+    } else {
+        r300->tcl_bypass = FALSE;
+    }
 
     r300->rs_state.state = rs;
     r300->rs_state.dirty = TRUE;