From c7a5d528c7e5f4812b423bf4c091d21c34af3cf1 Mon Sep 17 00:00:00 2001
From: Brian Paul <brian.paul@tungstengraphics.com>
Date: Tue, 28 Mar 2006 15:21:44 +0000
Subject: a little code movement so we don't make invalid casts from
 gl_renderbuffers to xmesa_renderbuffers

---
 src/mesa/drivers/x11/xm_dd.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/mesa/drivers/x11/xm_dd.c')

diff --git a/src/mesa/drivers/x11/xm_dd.c b/src/mesa/drivers/x11/xm_dd.c
index 9c0771e6cd..516b238d6e 100644
--- a/src/mesa/drivers/x11/xm_dd.c
+++ b/src/mesa/drivers/x11/xm_dd.c
@@ -214,10 +214,15 @@ color_mask(GLcontext *ctx,
            GLboolean rmask, GLboolean gmask, GLboolean bmask, GLboolean amask)
 {
    const XMesaContext xmesa = XMESA_CONTEXT(ctx);
-   XMesaBuffer xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
+   XMesaBuffer xmbuf;
    const int xclass = xmesa->xm_visual->mesa_visual.visualType;
    (void) amask;
 
+   if (ctx->DrawBuffer->Name != 0)
+      return;
+
+   xmbuf = XMESA_BUFFER(ctx->DrawBuffer);
+
    if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
       unsigned long m;
       if (rmask && gmask && bmask) {
-- 
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