Qt: fix MLModel

Was broken since the pure virtual method getId() was renamed in
the PLModel cleanup 4a61e6a8
(cherry picked from commit 88ecb49beedf3a62133ef4d062ee2e350b604aa2)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

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

@@ -237,7 +237,7 @@ void MLModel::doDelete( QModelIndexList list )
 {
     for (int i = 0; i < list.count(); ++i)
     {
-        int id = getId( list.at(i) );
+        int id = itemId( list.at(i) );
         ml_DeleteSimple( p_ml, id );
     }
 }
@@ -254,7 +254,7 @@ void MLModel::remove( QModelIndex idx )
     }
 }
 
-int MLModel::getId( QModelIndex index ) const
+int MLModel::itemId( const QModelIndex &index ) const
 {
     return getItem( index )->id();
 }

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

@@ -60,7 +60,7 @@ public:
             return static_cast<MLItem*>( index.internalPointer() );
         else return NULL;
     }
-    virtual int getId( QModelIndex index ) const;
+    virtual int itemId( const QModelIndex & ) const;
 
     QVariant data( const QModelIndex &idx, const int role = Qt::DisplayRole ) const;
     bool setData( const QModelIndex &idx, const QVariant &value,