Merge "NULL previous background bitmap upon changing wallpaper"
diff --git a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
index 4b0c2cb..d940406 100644
--- a/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
+++ b/packages/SystemUI/src/com/android/systemui/ImageWallpaper.java
@@ -202,6 +202,7 @@
             if (mReceiver != null) {
                 unregisterReceiver(mReceiver);
             }
+            mBackground = null;
         }
 
         @Override