Add thumbnail for Polar Clock live wallpaper.
diff --git a/res/drawable/polarclock_thumb.png b/res/drawable/polarclock_thumb.png
new file mode 100644
index 0000000..7994f4f
--- /dev/null
+++ b/res/drawable/polarclock_thumb.png
Binary files differ
diff --git a/res/xml/polar_clock.xml b/res/xml/polar_clock.xml
index 31b1abb..56702ac 100644
--- a/res/xml/polar_clock.xml
+++ b/res/xml/polar_clock.xml
@@ -21,5 +21,6 @@
 <!-- about the polar clock. -->
 
 <wallpaper xmlns:android="http://schemas.android.com/apk/res/android"
+		android:thumbnail="@drawable/polarclock_thumb"
         android:settingsActivity="com.android.wallpaper.polarclock.PolarClockSettings"
 />