Tweaks for canvas

Change-Id: I9aecf757047f93159212441e5317ef2b3b304a70
diff --git a/src/com/android/gallery3d/app/MovieActivity.java b/src/com/android/gallery3d/app/MovieActivity.java
index 3123644..40edbbe 100644
--- a/src/com/android/gallery3d/app/MovieActivity.java
+++ b/src/com/android/gallery3d/app/MovieActivity.java
@@ -127,6 +127,9 @@
     private void initializeActionBar(Intent intent) {
         mUri = intent.getData();
         final ActionBar actionBar = getActionBar();
+        if (actionBar == null) {
+            return;
+        }
         setActionBarLogoFromIntent(intent);
         actionBar.setDisplayOptions(
                 ActionBar.DISPLAY_HOME_AS_UP,