Update leave_application.py
See issue #2422 for more detail.
diff --git a/erpnext/hr/doctype/leave_application/leave_application.py b/erpnext/hr/doctype/leave_application/leave_application.py
index 50d1d6f..63eb796 100755
--- a/erpnext/hr/doctype/leave_application/leave_application.py
+++ b/erpnext/hr/doctype/leave_application/leave_application.py
@@ -204,6 +204,8 @@
tot_hol = frappe.db.sql("""select count(*) from `tabHoliday` h1, `tabHoliday List` h2, `tabEmployee` e1
where e1.name = %s and h1.parent = h2.name and e1.holiday_list = h2.name
and h1.holiday_date between %s and %s""", (leave_app.employee, leave_app.from_date, leave_app.to_date))
+ # below line is needed. If an employee hasn't been assigned with any holiday list then above will return 0 rows.
+ tot_hol=tot_hol and flt(tot_hol[0][0]) or 0
if not tot_hol:
tot_hol = frappe.db.sql("""select count(*) from `tabHoliday` h1, `tabHoliday List` h2
where h1.parent = h2.name and h1.holiday_date between %s and %s