[PATCH]XAA: fix one 64-bit bug in XAAValidateGC

[Hong Liu]

bgPixel (unsigned long) is 64-bit on x86_64, so -1 != 0xffffffff

This patch should fix bug 8080.

---
 hw/xfree86/xaa/xaaGC.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/xfree86/xaa/xaaGC.c b/hw/xfree86/xaa/xaaGC.c
index f3434c9..b3dc83a 100644
--- a/hw/xfree86/xaa/xaaGC.c
+++ b/hw/xfree86/xaa/xaaGC.c
@@ -80,10 +80,11 @@ XAAValidateGC(
     }
 
     if(pGC->depth != 32) {
-	if(pGC->bgPixel == -1) /* -1 is reserved for transparency */
-	    pGC->bgPixel = 0x7fffffff; 
-	if(pGC->fgPixel == -1) /* -1 is reserved for transparency */
-	    pGC->fgPixel = 0x7fffffff; 
+	/* 0xffffffff is reserved for transparency */
+	if(pGC->bgPixel == 0xffffffff)
+	    pGC->bgPixel = 0x7fffffff;
+	if(pGC->fgPixel == 0xffffffff)
+	    pGC->fgPixel = 0x7fffffff;
     }
 
     if((pDraw->type == DRAWABLE_PIXMAP) && !IS_OFFSCREEN_PIXMAP(pDraw)){
-- 
1.5.2