Bug 22288: Correct item search in batchMod by barcode file

Bug 22288: Correct item search in batchMod by barcode file

To test:
1 - Have a list of barcodes that exist in your catalog
2 - Go to Tools->Batch item modification
3 - Attempt to modify items using the list
4 - Get an error page
5 - Apply patch
6 - Repeat
7 - Modification should work correctly

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
(cherry picked from commit 192e3baa75f16891582244595fe305292b886dda)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>