1242 Add/Recan progress stats broken [#5574]

[chrisjj]

1 Add/Rescan a folder containing a 145 playlists referring to 553 files.

Expected: progress bar shows Adding 1 of 698 up to Adding 698 of 698
Observed: progress bar shows Adding 1 of random number <=145 , either remaining until completion, or replaced by Adding 0 of 1 until complete.

[rusty]

Thanks. Tracked at http://www.ventismedia.com/mantis/view.php?id=5574

-Rusty