[fix] when the last line in draft of the statement is confirmed, the statement should be confirmed only after passing the usual balance check, if the check is enabled in the profile. I add a test that shows the bug

account_statement_cancel_line/statement.py

@@ -95,4 +95,10 @@ class Statement(orm.Model):
                     'state': 'confirm'
                 }, context=context)
                 need_to_update_view = True
+                self.balance_check(
+                    cr,
+                    uid,
+                    statement.id,
+                    journal_type=statement.journal_id.type,
+                    context=context)
         return need_to_update_view