Fixing crash in Wallpaper picker. (3392415)

Change-Id: I907fd9c5bbac2a502d08bf591d17dbbf063c465e
diff --git a/src/com/android/launcher2/WallpaperChooserDialogFragment.java b/src/com/android/launcher2/WallpaperChooserDialogFragment.java
index ec0f8a2..4f13332 100644
--- a/src/com/android/launcher2/WallpaperChooserDialogFragment.java
+++ b/src/com/android/launcher2/WallpaperChooserDialogFragment.java
@@ -111,6 +111,8 @@
      */
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
+        findWallpapers();
+
         final View v = getActivity().getLayoutInflater().inflate(
                 R.layout.wallpaper_chooser, null, false);