initDbo null case

src/Business/lu-webapi-crud-business.js

@@ -35,6 +35,9 @@
 
                 Business.initDbo = function(dbo)
                 {
+                    if (dbo == null) {
+                        return null;
+                    }
                     return Business.extendDeep({}, Business.defaultDbo, dbo);
                 };