[FIX] stock: Fix strange ORM bidouille on picking creation

Purpose
=======

This bidouille on the ORM command seems to be from another age where the onchange on o2m list were not working well.

The issue is that _convert_to_write could return commands like (6, 0, []).

In that case the last tuple element is not dictionary, but a list.

Specification
=============

Fix that brol.

addons/stock/models/stock_picking.py

@@ -480,7 +480,7 @@ class Picking(models.Model):
         # As it is a create the format will be a list of (0, 0, dict)
         if vals.get('move_lines') and vals.get('location_id') and vals.get('location_dest_id'):
             for move in vals['move_lines']:
-                if len(move) == 3:
+                if len(move) == 3 and move[0] == 0:
                     move[2]['location_id'] = vals['location_id']
                     move[2]['location_dest_id'] = vals['location_dest_id']
         res = super(Picking, self).create(vals)