Fix per-vertex coverage on Macs with aligned attrib bug

Review URL: http://codereview.appspot.com/5250067



git-svn-id: http://skia.googlecode.com/svn/trunk@2458 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrContext.cpp b/gpu/src/GrContext.cpp
index 93a0a88..5921838 100644
--- a/gpu/src/GrContext.cpp
+++ b/gpu/src/GrContext.cpp
@@ -1059,7 +1059,7 @@
 
     GrColor innerColor;
     if (useVertexCoverage) {
-        innerColor = GrColorPackRGBA(0,0,0,0xff);
+        innerColor = 0xffffffff;
     } else {
         innerColor = target->getColor();
     }
@@ -1130,7 +1130,7 @@
 
     GrColor innerColor;
     if (useVertexCoverage) {
-        innerColor = GrColorPackRGBA(0,0,0,0xff);
+        innerColor = 0xffffffff;
     } else {
         innerColor = target->getColor();
     }