fix: Rounding Adjustment GL entry fix (#19838)

* fix: Rounding Adjustment GL entry fix

* fix: Spacing in tab

* fix: Comment fix
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index 3bb3df8..7b2061a 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -830,7 +830,11 @@
 			)
 
 	def make_gle_for_rounding_adjustment(self, gl_entries):
-		if self.rounding_adjustment:
+		# if rounding adjustment in small and conversion rate is also small then
+		# base_rounding_adjustment may become zero due to small precision
+		# eg: rounding_adjustment = 0.01 and exchange rate = 0.05 and precision of base_rounding_adjustment is 2
+		#	then base_rounding_adjustment becomes zero and error is thrown in GL Entry
+		if self.rounding_adjustment and self.base_rounding_adjustment:
 			round_off_account, round_off_cost_center = \
 				get_round_off_account_and_cost_center(self.company)
 
diff --git a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
index d024a31..c4d64a7 100644
--- a/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
+++ b/erpnext/accounts/doctype/sales_invoice/sales_invoice.py
@@ -953,7 +953,7 @@
 			)
 
 	def make_gle_for_rounding_adjustment(self, gl_entries):
-		if flt(self.rounding_adjustment, self.precision("rounding_adjustment")):
+		if flt(self.rounding_adjustment, self.precision("rounding_adjustment")) and self.base_rounding_adjustment:
 			round_off_account, round_off_cost_center = \
 				get_round_off_account_and_cost_center(self.company)