From abcb6b6d01c253627363a05205291630b5247018 Mon Sep 17 00:00:00 2001
From: Vinson Lee <vlee@vmware.com>
Date: Tue, 23 Feb 2010 00:19:30 -0800
Subject: mesa: Assert that array index is not negative.

---
 src/mesa/main/texcompress_fxt1.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/main/texcompress_fxt1.c b/src/mesa/main/texcompress_fxt1.c
index 71e40dd3e9..149853f7ac 100644
--- a/src/mesa/main/texcompress_fxt1.c
+++ b/src/mesa/main/texcompress_fxt1.c
@@ -528,6 +528,7 @@ fxt1_lloyd (GLfloat vec[][MAX_COMP], GLint nv,
 #else
          GLint best = fxt1_bestcol(vec, nv, input[k], nc, &err);
 #endif
+         assert(best >= 0);
          /* add in closest color */
          for (i = 0; i < nc; i++) {
             sum[best][i] += input[k][i];
-- 
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