Fixups for clipstack, convexity test for paths.

Review URL http://codereview.appspot.com/4250056/

git-svn-id: http://skia.googlecode.com/svn/trunk@891 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index e925e53..990c24b 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -289,7 +289,7 @@
                    GrIntToScalar(skBounds.fTop),
                    GrIntToScalar(skBounds.fRight),
                    GrIntToScalar(skBounds.fBottom));
-    GrClip grc(&iter, NULL);
+    GrClip grc(&iter, &bounds);
     context->setClip(grc);
 }