*) Fixing problems of list operation if index and queue size are both 0.

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@687 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/plasma/plasmaSwitchboardQueue.java

@@ -122,6 +122,7 @@ public class plasmaSwitchboardQueue {
     }
     
     public ArrayList list(int index) throws IOException {
+        if ((index==0) && (sbQueueStack.size()==0)) return new ArrayList(0);
         if ((index < 0) || (index >= sbQueueStack.size())) throw new ArrayIndexOutOfBoundsException();
         ArrayList list = sbQueueStack.botList(index);
         for (int i=0; i < list.size(); i++) {