Protect against warnings when no isbn/upc provided

Protect against Perl giving us uninitialized value warnings when
isbn or upc has not been provided.

Signed-off-by: Jeff Godin <jgodin@tadl.org>

diff --git a/Open-ILS/src/perlmods/lib/OpenILS/WWW/AddedContent/Syndetic.pm b/Open-ILS/src/perlmods/lib/OpenILS/WWW/AddedContent/Syndetic.pm
index 8226d72..37de072 100644 (file)
--- a/Open-ILS/src/perlmods/lib/OpenILS/WWW/AddedContent/Syndetic.pm
+++ b/Open-ILS/src/perlmods/lib/OpenILS/WWW/AddedContent/Syndetic.pm
@@ -268,6 +268,9 @@ sub fetch_response {
     my $isbn = $keys->{isbn}[0];
     my $upc = $keys->{upc}[0];
 
+    $isbn = '' if !defined($isbn);
+    $upc = '' if !defined($upc);
+
     my $url = $self->base_url . "?isbn=$isbn/$page&upc=$upc&client=$uname" . (($notype) ? '' : "&type=rw12");
     return $AC->get_url($url);
 }