Qt: make PLModel::getItem return rootItem as well, add id getter to PLItem

modules/gui/qt4/components/playlist/playlist_item.hpp

@@ -55,6 +55,7 @@ public:
 
     PLItem *parent() { return parentItem; }
     input_item_t *inputItem() { return p_input; }
+    int id() { return i_id; }
 
 protected:
     QList<PLItem*> children;

modules/gui/qt4/components/playlist/playlist_model.cpp

@@ -529,12 +529,6 @@ PLItem * PLModel::findInner( PLItem *root, int i_id, bool b_input )
 #undef CACHE
 #undef ICACHE
 
-PLItem *PLModel::getItem( QModelIndex index )
-{
-    assert( index.isValid() );
-    return static_cast<PLItem*>( index.internalPointer() );
-}
-
 int PLModel::columnToMeta( int _column ) const
 {
     int meta = 1;

modules/gui/qt4/components/playlist/playlist_model.hpp

@@ -96,7 +96,12 @@ public:
     void removeItem( int );
     void rebuild(); void rebuild( playlist_item_t *, bool b_first = false );
 
-    static inline PLItem *getItem( QModelIndex index );
+    inline PLItem *getItem( QModelIndex index ) const
+    {
+        if( index.isValid() )
+            return static_cast<PLItem*>( index.internalPointer() );
+        else return rootItem;
+    }
 
 private: