Bug 25341: Remove whitespace from barcode in add_items.pl

TEST PLAN:
1. Go to course reserves and trying adding a course with a barcode that has some leading/trailing whitespace.
2. It doesnt work
3. Apply patch and restart_all
4. Try again with leading/trailing whitespace, it should work.

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

course_reserves/add_items.pl

@@ -42,6 +42,8 @@ my $return       = $cgi->param('return')       || '';
 my $itemnumber   = $cgi->param('itemnumber')   || '';
 my $is_edit      = $cgi->param('is_edit')      || '';
 
+$barcode =~ s/^\s*|\s*$//g; #remove leading/trailing whitespace
+
 my $item = Koha::Items->find( { ( $itemnumber ? ( itemnumber => $itemnumber ) : ( barcode => $barcode ) ) } );
 $itemnumber = $item->id if $item;