rolling back the experimental rollbacks in r2178-2179

git-svn-id: http://skia.googlecode.com/svn/trunk@2180 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gpu/src/GrClip.cpp b/gpu/src/GrClip.cpp
index 7ccec26..ade8c2b 100644
--- a/gpu/src/GrClip.cpp
+++ b/gpu/src/GrClip.cpp
@@ -138,13 +138,9 @@
         }
     }
     fConservativeBoundsValid = false;
-    if (isectRectValid) {
+    if (isectRectValid && rectCount) {
+        fConservativeBounds = fList[0].fRect;
         fConservativeBoundsValid = true;
-        if (rectCount > 0) {
-            fConservativeBounds = fList[0].fRect;
-        } else {
-            fConservativeBounds.setEmpty();
-        }
     } else if (NULL != conservativeBounds) {
         fConservativeBounds = *conservativeBounds;
         fConservativeBoundsValid = true;