Minor correction to prevent useless comma at beginning of string, created from list

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@8059 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/data/ListManager.java

@@ -133,7 +133,8 @@ public class ListManager {
             final Iterator<String> it = col.iterator();
             str.append(it.next());
             while(it.hasNext()) {
-                str.append(',').append(it.next());
+            	if (str.length() > 0) str.append(',');
+            	str.append(it.next());
             }
         }