VENR#88522 Probleem met lege kalenderoptie toont '-1' in show-mode.

svn path=/Website/trunk/; revision=68703

APPL/ALG/alg_edit_gebouw.asp

@@ -240,6 +240,7 @@ else
                     , { label: L("lcl_calendar")
                       , initKey: kalender_id
                       , emptyOption: ""
+                      , emptyKey: ""
                       , readonly: !this_alg.writeman
                       }
                     );