Do not allow executing custorder if no customer is set

or really any reason, as defined by handler

tailbone/views/custorders/orders.py

@@ -956,6 +956,11 @@ class CustomerOrderView(MasterView):
                 'batch': self.normalize_batch(batch)}
 
     def submit_new_order(self, batch, data):
+
+        reason = self.batch_handler.why_not_execute(batch, user=self.request.user)
+        if reason:
+            return {'error': reason}
+
         try:
             result = self.execute_new_order_batch(batch, data)
         except Exception as error: