Fix comparison of GrPaint::fCoverage (which is a byte not a uint32_t)

git-svn-id: http://skia.googlecode.com/svn/trunk@3527 2bbb7eff-a529-9590-31e7-b0007b416f81

src/gpu/GrContext.cpp

@@ -1944,7 +1944,7 @@ void GrContext::setPaint(const GrPaint& paint) {
     fDrawState->setCoverage(paint.fCoverage);
 
 #if GR_DEBUG
-    if ((paint.getActiveMaskStageMask() || 0xffffffff != paint.fCoverage) &&
+    if ((paint.getActiveMaskStageMask() || 0xff != paint.fCoverage) &&
         !fGpu->canApplyCoverage()) {
         GrPrintf("Partial pixel coverage will be incorrectly blended.\n");
     }