diff --git a/erpnext/accounts/doctype/journal_entry/journal_entry.py b/erpnext/accounts/doctype/journal_entry/journal_entry.py
index 1e2b352..1f296e5 100644
--- a/erpnext/accounts/doctype/journal_entry/journal_entry.py
+++ b/erpnext/accounts/doctype/journal_entry/journal_entry.py
@@ -81,7 +81,8 @@
 				frappe.throw(_("Row {0}: Party Type and Party is only applicable against Receivable / Payable account").format(d.idx))
 
 	def check_credit_limit(self):
-		customers = list(set([d.party for d in self.get("accounts") if d.party_type=="Customer" and flt(d.debit) > 0]))
+		customers = list(set([d.party for d in self.get("accounts") 
+			if d.party_type=="Customer" and d.party and flt(d.debit) > 0]))
 		if customers:
 			from erpnext.selling.doctype.customer.customer import check_credit_limit
 			for customer in customers:
diff --git a/erpnext/hr/doctype/leave_allocation/leave_allocation.py b/erpnext/hr/doctype/leave_allocation/leave_allocation.py
index 272ec39..4e74b28 100755
--- a/erpnext/hr/doctype/leave_allocation/leave_allocation.py
+++ b/erpnext/hr/doctype/leave_allocation/leave_allocation.py
@@ -23,9 +23,6 @@
 	def on_update(self):
 		self.get_total_allocated_leaves()
 
-	def on_cancel(self):
-		self.check_for_leave_application()
-
 	def validate_new_leaves_allocated_value(self):
 		"""validate that leave allocation is in multiples of 0.5"""
 		if flt(self.new_leaves_allocated) % 0.5: