From b6971e08b8e0b37434988371a8608ed2543dd055 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= <marcandre.lureau@gmail.com>
Date: Thu, 5 Mar 2015 22:43:46 +0100
Subject: [PATCH] shader: ignore empty color mask in emit_color_select()

Fixes piglit interpolation-flat-other-flat-none.shader_test
---
 src/vrend_shader.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/vrend_shader.c b/src/vrend_shader.c
index a53ee2d..d997c0c 100644
--- a/src/vrend_shader.c
+++ b/src/vrend_shader.c
@@ -678,8 +678,8 @@ static int emit_color_select(struct dump_ctx *ctx)
 {
    char buf[255];
    char *sret = NULL;
-   
-   if (!ctx->key->color_two_side)
+
+   if (!ctx->key->color_two_side || !(ctx->color_in_mask & 0x3))
       return 0;
 
    if (ctx->color_in_mask & 1) {