fix [2017532] Partial Update leaves residual image.
diff --git a/libs/surfaceflinger/SurfaceFlinger.h b/libs/surfaceflinger/SurfaceFlinger.h
index 15913f2..0d63e1d 100644
--- a/libs/surfaceflinger/SurfaceFlinger.h
+++ b/libs/surfaceflinger/SurfaceFlinger.h
@@ -351,6 +351,7 @@
                 // Can only accessed from the main thread, these members
                 // don't need synchronization
                 Region                      mDirtyRegion;
+                Region                      mDirtyRegionRemovedLayer;
                 Region                      mInvalidRegion;
                 Region                      mWormholeRegion;
                 Client*                     mLastScheduledBroadcast;