[FIX] stock: update inventory wizard, default location_id

In a multi-company environment, you might not
have the access to the stock location
`stock.stock_location_stock`,
in such a case, you should not set it as default value.

This is a regression of revision 9bf6f0310e

opw-652387

addons/stock/wizard/stock_change_product_qty.py

@@ -68,7 +68,7 @@ class stock_change_product_qty(osv.osv_memory):
                 try:
                     self.pool.get('stock.location').check_access_rule(cr, uid, [location_id], 'read', context=context)
                 except (orm.except_orm, ValueError):
-                   pass
+                   location_id = False
             res['location_id'] = location_id
         return res