Dont attempt access checking on models without a check access method

lib/application.js

@@ -164,6 +164,7 @@ app.enableAuth = function() {
     var modelInstance = ctx.instance;
     var modelId = modelInstance && modelInstance.id || req.param('id');
 
+    if(Model.checkAccess) {
       Model.checkAccess(
         req.accessToken,
         modelId,
@@ -181,6 +182,9 @@ app.enableAuth = function() {
           }
         }
       );
+    } else {
+      next();
+    }
   });
 }