[longomatch] Copy some properties when replacing and preserver order.

[Andoni Morales Alastruey <amorales src gnome org>]

commit 5fbbcb891405a7b2a39c718e5c031a1b1c0a6118
Author: Julien Moutte <julien fluendo com>
Date:   Fri Mar 6 16:06:40 2015 +0100

    Copy some properties when replacing and preserver order.

 LongoMatch.Core/Store/MediaFileSet.cs |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)
---
diff --git a/LongoMatch.Core/Store/MediaFileSet.cs b/LongoMatch.Core/Store/MediaFileSet.cs
index 3dc64e0..8e8d4d7 100644
--- a/LongoMatch.Core/Store/MediaFileSet.cs
+++ b/LongoMatch.Core/Store/MediaFileSet.cs
@@ -116,6 +116,7 @@ namespace LongoMatch.Core.Store
                /// <summary>
                /// Search for a file in the set and replace it with a new one.
                /// If old file is not found, this is equivalent to adding new file to the set.
+               /// Some properties from the old file are copied to the new file such as Name and Offset.
                /// </summary>
                /// <param name="old_file">Old file.</param>
                /// <param name="new_file">New file.</param>
@@ -124,13 +125,17 @@ namespace LongoMatch.Core.Store
                        bool found = false;
 
                        if (Contains (old_file)) {
-                               Remove (old_file);
+                               if (new_file != null && old_file != null) {
+                                       new_file.Name = old_file.Name;
+                                       new_file.Offset = old_file.Offset;
+                               }
+
+                               this [IndexOf (old_file)] = new_file;
                                found = true;
+                       } else {
+                               Add (new_file);
                        }
 
-                       //FIXME: Should we copy some properties from the previous file such as Offset ?
-                       Add (new_file);
-
                        return found;
                }