minor fix in get_property

webnotes/model/doctype.py

@@ -302,7 +302,8 @@ def get_property(dt, prop, fieldname=None):
 	"""get a doctype property"""
 	doctypelist = get(dt)
 	if fieldname:
-		return doctypelist.getone({"fieldname":fieldname}).fields.get(prop)
+		field = doctypelist.get_field(fieldname)
+		return field and field.fields.get(prop) or None
 	else:
 		return doctypelist[0].fields.get(prop)