Skins2: use the right id when creating the tree Resolve some bugs related to...

Skins2: use the right id when creating the tree Resolve some bugs related to the playlist in Skins2, like adding items in the wrong place, and services discovery not showing.
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/gui/skins2/vars/playtree.cpp

@@ -198,7 +198,7 @@ void Playtree::buildNode( playlist_item_t *pNode, VarTree &rTree )
     {
         UString *pName = new UString( getIntf(),
                                    pNode->pp_children[i]->p_input->psz_name );
-        rTree.add( pNode->pp_children[i]->p_input->i_id, UStringPtr( pName ),
+        rTree.add( pNode->pp_children[i]->i_id, UStringPtr( pName ),
                      false,
                      m_pPlaylist->status.p_item == pNode->pp_children[i],
                      false, pNode->pp_children[i]->i_flags & PLAYLIST_RO_FLAG,