From Monsieur Thomas. The matcher gets cranky when presented with null.

git-svn-id: https://samskivert.googlecode.com/svn/trunk@2939 6335cc39-0255-0410-8fd6-9bcaacd3b74c

src/main/java/com/samskivert/net/MACUtil.java

@@ -68,6 +68,10 @@ public class MACUtil
      */
     protected static String[] parseMACs (String text)
     {
+        if (text == null) {
+            return new String[0];
+        }
+
         Matcher m = MACRegex.matcher(text);
 
         ArrayList<String> list = new ArrayList<String>();