[minor] validate template in Standard Reply while saving, fixes #1884

frappe/email/doctype/standard_reply/standard_reply.py

@@ -4,9 +4,11 @@
 from __future__ import unicode_literals
 import frappe, json
 from frappe.model.document import Document
+from frappe.utils.jinja import validate_template
 
 class StandardReply(Document):
-	pass
+	def validate(self):
+		validate_template(self.response)
 
 @frappe.whitelist()
 def get_standard_reply(template_name, doc):