Bug 16356: Fix Error 500 when returning an item which itemtype is not…

… in itemtypes table

  Test plan :
    * Find an item with itemtype (itype or bilbioitems.itemtype
      depending on syspref) does not exist in itemtypes table
    * If necessary, change itemtype of one of your item
    * Check out this item
    * Try to check it in, you've got a 500 Error and item is not
      returned

    With the patch
    * Try to check your item in. Item is correctly returned

Signed-off-by: Owen Leonard <oleonard@myacpl.org>

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>

C4/ItemType.pm

@@ -116,6 +116,7 @@ sub get {
     my $data = $dbh->selectrow_hashref(
         "SELECT * FROM itemtypes WHERE itemtype = ?", undef, $itemtype
     );
+    return unless defined $data;
     return $class->new($data);
 }