fix: Trial Balance failing to ignore Finance Book

(cherry picked from commit 48bde2d)

erpnext/accounts/report/trial_balance/trial_balance.py

@@ -160,14 +160,10 @@ def get_rootwise_opening_balances(filters, report_type):
 	if filters.project:
 		additional_conditions += " and project = %(project)s"
 
-	if filters.finance_book:
-		fb_conditions = " AND finance_book = %(finance_book)s"
-		if filters.include_default_book_entries:
-			fb_conditions = (
-				" AND (finance_book in (%(finance_book)s, %(company_fb)s, '') OR finance_book IS NULL)"
-			)
-
-		additional_conditions += fb_conditions
+	if filters.get("include_default_book_entries"):
+		additional_conditions += "AND (finance_book in (%(finance_book)s, %(company_fb)s, '') OR finance_book IS NULL)"
+	else:
+		additional_conditions += "AND (finance_book in (%(finance_book)s, '') OR finance_book IS NULL)"
 
 	accounting_dimensions = get_accounting_dimensions(as_list=False)