Prevent an NPE

By actually setting the adapter on NestedFolderView.

Bug: 10461002
Change-Id: I19bbc7d7cdaec446aaa2ee58b8ab53b2026388e7
diff --git a/src/com/android/mail/ui/AnimatedAdapter.java b/src/com/android/mail/ui/AnimatedAdapter.java
index e6d6e59..2a53f40 100644
--- a/src/com/android/mail/ui/AnimatedAdapter.java
+++ b/src/com/android/mail/ui/AnimatedAdapter.java
@@ -296,6 +296,7 @@
         do {
             final NestedFolderView view =
                     (NestedFolderView) inflater.inflate(R.layout.nested_folder, null);
+            view.setAdapter(this);
             view.setFolder(cursor.getModel());
             folders.add(view);
         } while (cursor.moveToNext());