fix test for valid texunit in _mesa_ClientActiveTextureARB

diff --git a/src/mesa/main/texstate.c b/src/mesa/main/texstate.c
index 608dbc1..46cebe9 100644 (file)
--- a/src/mesa/main/texstate.c
+++ b/src/mesa/main/texstate.c
@@ -2692,7 +2692,7 @@ _mesa_ClientActiveTextureARB( GLenum target )
    GLuint texUnit = target - GL_TEXTURE0;
    ASSERT_OUTSIDE_BEGIN_END(ctx);
 
-   if (texUnit > ctx->Const.MaxTextureUnits) {
+   if (texUnit >= ctx->Const.MaxTextureUnits) {
       _mesa_error(ctx, GL_INVALID_ENUM, "glClientActiveTexture(target)");
       return;
    }