[FIX] stock_account: fix sum list of dict

This commit fixes summing list of dicts returned by
_prepare_analytic_lines.

closes odoo/odoo#152819

Nb: This code is not yet covered by a test use case.
Signed-off-by: Cedric Snauwaert <csn@odoo.com>

addons/stock_account/models/stock_move.py

@@ -427,8 +427,8 @@ class StockMove(models.Model):
             account_valuation = accounts_data.get('stock_valuation', False)
             analytic_line_vals = self.stock_valuation_layer_ids.account_move_id.line_ids.filtered(
                 lambda l: l.account_id == account_valuation)._prepare_analytic_lines()
-            amount = - sum(sum(vals['amount'] for vals in lists) for lists in analytic_line_vals)
-            unit_amount = - sum(sum(vals['unit_amount'] for vals in lists) for lists in analytic_line_vals)
+            amount = - sum(vals['amount'] for vals in analytic_line_vals)
+            unit_amount = - sum(vals['unit_amount'] for vals in analytic_line_vals)
         elif sum(self.stock_valuation_layer_ids.mapped('quantity')):
             amount = sum(self.stock_valuation_layer_ids.mapped('value'))
             unit_amount = - sum(self.stock_valuation_layer_ids.mapped('quantity'))