Fix broken list selection model implementation.

Change-Id: I70c7ae244e5a70422dde66cef1fc9f99895fe227
Fixes-Issue: CLIENT-515
Reviewed-on: http://gerrit.dmdirc.com/3630
Automatic-Compile: DMDirc Build Manager
Reviewed-by: Shane Mc Cormack <shane@dmdirc.com>

src/com/dmdirc/addons/ui_swing/components/vetoable/VetoableListSelectionModel.java

@@ -90,9 +90,10 @@ public class VetoableListSelectionModel implements ListSelectionModel {
                 new PropertyChangeEvent(this, "selection", selection, index0))) {
             return;
         }
+        final int oldSelection = selection;
         selection = index0;
         listeners.getCallable(ListSelectionListener.class).valueChanged(new ListSelectionEvent(this,
-                selection, selection, valueAdjusting));
+                oldSelection, selection, valueAdjusting));
     }
 
     @Override