YTD and MTD  Messed up in Salary Slip

The filter for YTD, MTD etc are based on employee name. This seems like an amateur mistake. It should be based on employee id.

(cherry picked from commit efc292a5ddc00e433d75b87d6b3378455bac4438)
diff --git a/erpnext/payroll/doctype/salary_slip/salary_slip.py b/erpnext/payroll/doctype/salary_slip/salary_slip.py
index d113e7e..86a0807 100644
--- a/erpnext/payroll/doctype/salary_slip/salary_slip.py
+++ b/erpnext/payroll/doctype/salary_slip/salary_slip.py
@@ -1244,7 +1244,7 @@
 
 		salary_slip_sum = frappe.get_list('Salary Slip',
 			fields = ['sum(net_pay) as net_sum', 'sum(gross_pay) as gross_sum'],
-			filters = {'employee_name' : self.employee_name,
+			filters = {'employee' : self.employee,
 				'start_date' : ['>=', period_start_date],
 				'end_date' : ['<', period_end_date],
 				'name': ['!=', self.name],
@@ -1264,7 +1264,7 @@
 		first_day_of_the_month = get_first_day(self.start_date)
 		salary_slip_sum = frappe.get_list('Salary Slip',
 			fields = ['sum(net_pay) as sum'],
-			filters = {'employee_name' : self.employee_name,
+			filters = {'employee' : self.employee,
 				'start_date' : ['>=', first_day_of_the_month],
 				'end_date' : ['<', self.start_date],
 				'name': ['!=', self.name],
@@ -1288,13 +1288,13 @@
 					INNER JOIN `tabSalary Slip` as salary_slip
 					ON detail.parent = salary_slip.name
 					WHERE
-						salary_slip.employee_name = %(employee_name)s
+						salary_slip.employee = %(employee)s
 						AND detail.salary_component = %(component)s
 						AND salary_slip.start_date >= %(period_start_date)s
 						AND salary_slip.end_date < %(period_end_date)s
 						AND salary_slip.name != %(docname)s
 						AND salary_slip.docstatus = 1""",
-						{'employee_name': self.employee_name, 'component': component.salary_component, 'period_start_date': period_start_date,
+						{'employee': self.employee, 'component': component.salary_component, 'period_start_date': period_start_date,
 							'period_end_date': period_end_date, 'docname': self.name}
 				)