am b01856da: Merge "Delivering null cursor to loader callbacks." into honeycomb

* commit 'b01856da54892647afed260d017352d58648acc3':
  Delivering null cursor to loader callbacks.
diff --git a/core/java/android/app/LoaderManager.java b/core/java/android/app/LoaderManager.java
index 5f8c098..1ef011c 100644
--- a/core/java/android/app/LoaderManager.java
+++ b/core/java/android/app/LoaderManager.java
@@ -353,7 +353,7 @@
             
             // Notify of the new data so the app can switch out the old data before
             // we try to destroy it.
-            if (mData != data) {
+            if (data == null || mData != data) {
                 mData = data;
                 if (mStarted) {
                     callOnLoadFinished(loader, data);