[PATCH] Tasklist: Make d&d in deskbar mode behave as in vertical mode

[Hudd]

Previous behaviour when drag & dropping window buttons was
conuter-intuitive: buttons are arranged vertically in deskbar mode,
yet the x coordinate was used to determine where to put the dropped
button.
    
I.e. when a button was dropped on the right half of other button,
it was placed above, and when dropped on the left side, it was
placed below the button under cursor.
    
Add check for deskbar mode, and use the y coordinate instead.
    
I suspect that this function was forgotten to be updated when deskbar
mode was added.

---
diff --git a/plugins/tasklist/tasklist-widget.c
b/plugins/tasklist/tasklist-widget.c
index d596813..0482d7d 100644
--- a/plugins/tasklist/tasklist-widget.c
+++ b/plugins/tasklist/tasklist-widget.c
@@ -3071,8 +3071,9 @@ xfce_tasklist_button_drag_data_received (GtkWidget
*button,
   sibling = g_list_find (tasklist->windows, child2);
   panel_return_if_fail (sibling != NULL);
 
-  if ((!xfce_tasklist_vertical (tasklist) && x >=
button->allocation.width / 2)
-      || (xfce_tasklist_vertical (tasklist) && y >=
button->allocation.height / 2))
+  if ((xfce_tasklist_horizontal (tasklist) && x >=
button->allocation.width / 2)
+      || ((xfce_tasklist_vertical (tasklist) || xfce_tasklist_deskbar
(tasklist))
+          && y >= button->allocation.height / 2))
     sibling = g_list_next (sibling);
 
   xid = *((gulong *) gtk_selection_data_get_data (selection_data));