Mesa (master): vbo: fix divide by zero exception

[Brian Paul]

Module: Mesa
Branch: master
Commit: 93aa0fd81c44c7a5f29f30e8f730e060597b06ad
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=93aa0fd81c44c7a5f29f30e8f730e060597b06ad

Author: Brian Paul <brianp at vmware.com>
Date:   Mon Aug 24 12:43:57 2009 -0600

vbo: fix divide by zero exception

Fixes bug 23489.

---

 src/mesa/vbo/vbo_exec_draw.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/src/mesa/vbo/vbo_exec_draw.c b/src/mesa/vbo/vbo_exec_draw.c
index d76c45f..625452a 100644
--- a/src/mesa/vbo/vbo_exec_draw.c
+++ b/src/mesa/vbo/vbo_exec_draw.c
@@ -398,7 +398,7 @@ vbo_exec_vtx_flush( struct vbo_exec_context *exec, GLboolean unmap )
       vbo_exec_vtx_unmap( exec );
    }
 
-   if (unmap) 
+   if (unmap || exec->vtx.vertex_size == 0)
       exec->vtx.max_vert = 0;
    else
       exec->vtx.max_vert = ((VBO_VERT_BUFFER_SIZE - exec->vtx.buffer_used) /