Fix Surface leak
Bug #6452240

Change-Id: I891bd13546aadb4bff9e119f60c3fa4717b0cb91
diff --git a/src/com/android/wallpaper/RenderScriptWallpaper.java b/src/com/android/wallpaper/RenderScriptWallpaper.java
index a8f86e0..0016d33 100644
--- a/src/com/android/wallpaper/RenderScriptWallpaper.java
+++ b/src/com/android/wallpaper/RenderScriptWallpaper.java
@@ -53,6 +53,7 @@
                 mRenderer = null;
             }
             if (mRs != null) {
+                mRs.setSurface(null, 0, 0);
                 mRs.destroy();
                 mRs = null;
             }