fix graph reports when no cust_classnum is provided, #26028, from #24776

diff --git a/FS/FS/Report/Table.pm b/FS/FS/Report/Table.pm
index 1d60b64..da49161 100644 (file)
--- a/FS/FS/Report/Table.pm
+++ b/FS/FS/Report/Table.pm
@@ -757,7 +757,7 @@ sub with_cust_classnum {
     return 'cust_main.classnum in('. join(',',@$classnums) .')'
       if @$classnums;
   }
-  '';
+  ();
 }