Fix crash for some seed values.

Change-Id: I2f8d0a388a1bfdd4d3111abce7e4bcafe1e9bf3d
Fixes: 30169383
diff --git a/packages/EasterEgg/src/com/android/egg/neko/Cat.java b/packages/EasterEgg/src/com/android/egg/neko/Cat.java
index d20e9c7..a4df372 100644
--- a/packages/EasterEgg/src/com/android/egg/neko/Cat.java
+++ b/packages/EasterEgg/src/com/android/egg/neko/Cat.java
@@ -143,7 +143,7 @@
         mSeed = seed;
 
         setName(context.getString(R.string.default_cat_name,
-                String.valueOf(mSeed).substring(0, 3)));
+                String.valueOf(mSeed % 1000)));
 
         final Random nsr = notSoRandom(seed);