Bug 22302: Make ITEMTYPECAT descriptions fallback to lib description if no opac description

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>

C4/Koha.pm

@@ -101,7 +101,7 @@ sub GetItemTypesCategorized {
         SELECT itemtype, description, imageurl, hideinopac, 0 as 'iscat' FROM itemtypes WHERE ISNULL(searchcategory) or length(searchcategory) = 0
         UNION
         SELECT DISTINCT searchcategory AS `itemtype`,
-                        authorised_values.lib_opac AS description,
+                        COALESCE(authorised_values.lib_opac,authorised_values.lib) AS description,
                         authorised_values.imageurl AS imageurl,
                         hideinopac, 1 as 'iscat'
         FROM itemtypes
@@ -109,7 +109,7 @@ sub GetItemTypesCategorized {
         WHERE searchcategory > '' and hideinopac=1
         UNION
         SELECT DISTINCT searchcategory AS `itemtype`,
-                        authorised_values.lib_opac AS description,
+                        COALESCE(authorised_values.lib_opac,authorised_values.lib) AS description,
                         authorised_values.imageurl AS imageurl,
                         hideinopac, 1 as 'iscat'
         FROM itemtypes