Add error message when built-in wallpapers not found
diff --git a/src/com/android/launcher3/WallpaperPickerActivity.java b/src/com/android/launcher3/WallpaperPickerActivity.java
index 6c09347..ec0106f 100644
--- a/src/com/android/launcher3/WallpaperPickerActivity.java
+++ b/src/com/android/launcher3/WallpaperPickerActivity.java
@@ -353,6 +353,8 @@
                     mImages.add(res);
                     // Log.d(TAG, "add: [" + packageName + "]: " + extra + " (" + res + ")");
                 }
+            } else {
+                Log.e(TAG, "Couldn't find wallpaper " + extra);
             }
         }
     }