[FIX] stock_account: always return a value

4612d50bae fixed 9eac6c6377 as _run_valuation did not returned any result
4612d50bae was however returning a value only in one case

Move the return statement to alaways return value_to_return, whatever the state
of the move

closes odoo/odoo#32401

Signed-off-by: Simon Goffin (sig) <sig@openerp.com>

addons/stock_account/models/stock.py

@@ -321,6 +321,7 @@ class StockMove(models.Model):
 
     def _run_valuation(self, quantity=None):
         self.ensure_one()
+        value_to_return = 0
         if self._is_in():
             valued_move_lines = self.move_line_ids.filtered(lambda ml: not ml.location_id._should_be_valued() and ml.location_dest_id._should_be_valued() and not ml.owner_id)
             valued_quantity = 0
@@ -378,7 +379,7 @@ class StockMove(models.Model):
                 'value': value_to_return,
                 'price_unit': price_unit if self._is_dropshipped() else -price_unit,
             })
-            return value_to_return
+        return value_to_return
 
     def _action_done(self):
         self.product_price_update_before_done()