fix: set default to zero on salary component. (#552)

Co-authored-by: Rucha Mahabal <ruchamahabal2@gmail.com>

hrms/payroll/doctype/salary_slip/salary_slip.py

@@ -956,7 +956,7 @@ def add_structure_components(self, component_type):
 				# update statitical component amount in reference data based on payment days
 				# since row for statistical component is not added to salary slip
 
-				self.default_data[struct_row.abbr] = amount
+				self.default_data[struct_row.abbr] = flt(amount)
 				if struct_row.depends_on_payment_days:
 					joining_date, relieving_date = self.get_joining_and_relieving_dates()
 					payment_days_amount = (