[banshee/stable-2.6] PrimarySource: fix crash if 1st track had a Dap transcoding error (bgo#700753)

[Andrés Aragoneses <aaragoneses src gnome org>]

commit 8ce580af7aebc211d3653cb4eef1b0c73ba3c4e4
Author: Andres G. Aragoneses <knocte gmail com>
Date:   Wed May 22 15:14:21 2013 +0100

    PrimarySource: fix crash if 1st track had a Dap transcoding error (bgo#700753)
    
    The method IncrementAddedTracks() was accessing the field add_track_job, which
    would make Banshee crash with a NullReferenceException. By judging from the
    stack trace that the user supplied, this was likely to happen only if the very
    1st track being transferred through Dap had a transcoding error (otherwise the
    code flow would access a method which initializes add_track_job if it is null).
    
    By using the property AddTrackJob instead of the field add_track_job, we make
    this method capable of initializing the field too in case it's reached the first
    when Dap transfer happens.

 .../Banshee.Sources/PrimarySource.cs               |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Core/Banshee.Services/Banshee.Sources/PrimarySource.cs 
b/src/Core/Banshee.Services/Banshee.Sources/PrimarySource.cs
index a1250ec..2d637ec 100644
--- a/src/Core/Banshee.Services/Banshee.Sources/PrimarySource.cs
+++ b/src/Core/Banshee.Services/Banshee.Sources/PrimarySource.cs
@@ -663,7 +663,7 @@ namespace Banshee.Sources
             bool finished = false, notify = false;
 
             lock (this) {
-                add_track_job.Completed++;
+                AddTrackJob.Completed++;
 
                 if (add_track_job.IsFinished) {
                     finished = true;