Mesa (master): i965: skip too small size mipmap

[Nan hai Zou]

Module: Mesa
Branch: master
Commit: a728646fb55245477d35e2761c3e0d15099b4cd4
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=a728646fb55245477d35e2761c3e0d15099b4cd4

Author: Zou Nan hai <nanhai.zou at intel.com>
Date:   Thu Jan  6 11:36:23 2011 +0800

i965: skip too small size mipmap

	this fixes doom3 crash.

---

 src/mesa/drivers/dri/intel/intel_tex_validate.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/mesa/drivers/dri/intel/intel_tex_validate.c b/src/mesa/drivers/dri/intel/intel_tex_validate.c
index f1c6239..31c0a83 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_validate.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_validate.c
@@ -156,8 +156,10 @@ intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
       for (i = tObj->BaseLevel; i <= intelObj->_MaxLevel; i++) {
          struct intel_texture_image *intelImage =
             intel_texture_image(intelObj->base.Image[face][i]);
-
-         /* Need to import images in main memory or held in other trees.
+	 /* skip too small size mipmap */
+ 	 if (intelImage == NULL)
+		 break;
+	 /* Need to import images in main memory or held in other trees.
 	  * If it's a render target, then its data isn't needed to be in
 	  * the object tree (otherwise we'd be FBO incomplete), and we need
 	  * to keep track of the image's MT as needing to be pulled in still,