Mesa (master): glsl: Add assert to check input to strcmp.

[Vinson Lee]

Module: Mesa
Branch: master
Commit: 8462fe2bbf2aac87e6eabddc805b3d3ec63c6376
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=8462fe2bbf2aac87e6eabddc805b3d3ec63c6376

Author: Vinson Lee <vlee at vmware.com>
Date:   Tue Mar  2 01:10:29 2010 -0800

glsl: Add assert to check input to strcmp.

---

 src/mesa/shader/slang/slang_builtin.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/mesa/shader/slang/slang_builtin.c b/src/mesa/shader/slang/slang_builtin.c
index 5533cc5..f0659a8 100644
--- a/src/mesa/shader/slang/slang_builtin.c
+++ b/src/mesa/shader/slang/slang_builtin.c
@@ -142,6 +142,7 @@ lookup_statevar(const char *var, GLint index1, GLint index2, const char *field,
       tokens[1] = index1;
    }
    else if (strcmp(var, "gl_Point") == 0) {
+      assert(field);
       if (strcmp(field, "size") == 0) {
          tokens[0] = STATE_POINT_SIZE;
          *swizzleOut = SWIZZLE_XXXX;