Fix Serialization merge's issue

Sources/Model/Serialization/LINQ_XML_Serialization.cs

@@ -195,7 +195,7 @@ public class LINQ_XML_Serialization : IDataManager
                                                   new XAttribute("Name", p.Name),
                                                   new XElement("Description", p.Description),
                                                   new XElement("ImageURL", p.ImageURL),
-                                                  new XElement("Titles", p.Morceaux.Count() > 0 ? p.Morceaux.Select(a => a.ImageURL).Aggregate((albumUrl, nextAlbum) => albumUrl + " " + nextAlbum) : "")
+                                                  new XElement("Titles", p.Titles.Count() > 0 ? p.Titles.Select(a => a.ImageURL).Aggregate((albumUrl, nextAlbum) => albumUrl + " " + nextAlbum) : "")
                                                   ));
 
             PlaylistFile.Add(new XElement("Playlists", playlist));
@@ -247,7 +247,7 @@ public class LINQ_XML_Serialization : IDataManager
                                                     new XAttribute("Name", playlist.Name),
                                                     new XElement("Description", playlist.Description),
                                                     new XElement("ImageURL", playlist.ImageURL),
-                                                    new XElement("Titles", playlist.Morceaux.Count() > 0 ? playlist.Morceaux.Select(p => p.ImageURL).Aggregate((playlistUrl, nextPlaylist) => playlistUrl + " " + nextPlaylist) : "")
+                                                    new XElement("Titles", playlist.Titles.Count() > 0 ? playlist.Titles.Select(p => p.ImageURL).Aggregate((playlistUrl, nextPlaylist) => playlistUrl + " " + nextPlaylist) : "")
                                                     ));
         PlaylistsFichier.Add(new XElement("Playlists", playlist));