Log a warning and return null.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@2862 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/media/image/ColorPository.java

@@ -1,5 +1,5 @@
 //
-// $Id: ColorPository.java,v 1.4 2003/06/23 18:06:57 mdb Exp $
+// $Id: ColorPository.java,v 1.5 2003/11/22 19:57:16 mdb Exp $
 
 package com.threerings.media.image;
 
@@ -83,6 +83,13 @@ public class ColorPository implements Serializable
                     list.toArray(new ColorRecord[list.size()]);
             }
 
+            // sanity check
+            if (_starters.length < 1) {
+                Log.warning("Requested random starting color from " +
+                            "colorless component class " + this + "].");
+                return null;
+            }
+
             // return a random entry from the array
             return _starters[RandomUtil.getInt(_starters.length)];
         }