[FIX] stock_account: change standard price in perpetual valuation

When the standard price is changed for a product in perpetual valuation,
the account used is the expense account on the product, while it should
be the Counter-Part Account specified in the wizard.

This adapts the commit 935e61bab5 to work with 40bd4a2f05.

opw-681846

addons/stock_account/product.py

@@ -168,7 +168,7 @@ class product_product(osv.osv):
             self.valuation = 'manual_periodic'
         return {}
 
-    def do_change_standard_price(self, cr, uid, ids, new_price, context=None):
+    def do_change_standard_price(self, cr, uid, ids, new_price, account_id, context=None):
         """ Changes the Standard Price of Product and creates an account move accordingly."""
         location_obj = self.pool.get('stock.location')
         move_obj = self.pool.get('account.move')
@@ -190,11 +190,11 @@ class product_product(osv.osv):
                     # Accounting Entries
                     amount_diff = abs(diff * qty)
                     if diff * qty > 0:
-                        debit_account_id = datas['expense'].id
+                        debit_account_id = account_id
                         credit_account_id = datas['stock_valuation'].id
                     else:
                         debit_account_id = datas['stock_valuation'].id
-                        credit_account_id = datas['expense'].id
+                        credit_account_id = account_id
 
                     lines = [(0, 0, {'name': _('Standard Price changed'),
                                     'account_id': debit_account_id,

addons/stock_account/wizard/stock_change_standard_price.py

@@ -66,6 +66,6 @@ class change_standard_price(osv.osv_memory):
             rec_ids = prod_obj.browse(cr, uid, rec_id, context=context).product_variant_ids.mapped('id')
         else:
             rec_ids = [rec_id]
-        prod_obj = self.pool.get('product.product')
-        prod_obj.do_change_standard_price(cr, uid, rec_ids, new_price, context)
+        res = self.browse(cr, uid, ids, context=context)[0]
+        self.pool.get('product.product').do_change_standard_price(cr, uid, rec_ids, new_price, res.counterpart_account_id.id, context=context)
         return {'type': 'ir.actions.act_window_close'}