Merge change I85f598e0 into eclair-mr2

* changes:
  Prevent transparent region from getting out of sync with Surface Flinger

core/java/android/view/ViewRoot.java

@@ -898,6 +898,7 @@ public final class ViewRoot extends Handler implements ViewParent,
                         // all at once.
                         newSurface = true;
                         fullRedrawNeeded = true;
+                        mPreviousTransparentRegion.setEmpty();
 
                         if (mGlWanted && !mUseGL) {
                             initializeGL();