**Impacted versions:** 8.0

**Steps to reproduce:**
To reproduce it is necessary the fifo configuration in the assignation of quants in moves.

- Create a sale order with two lines of the same product, one of that line with a route that generate moves between warehouse.

<img width="1231" alt="skitch 65" src="https://cloud.githubusercontent.com/assets/11341058/24102907/d575a638-0d53-11e7-922e-a3f034d43e94.png">

The route used has three pull rules:

1. From Stock Warehouse_1 to Virtual Locations/Inter Company Transit
2. From Virtual Locations/Inter Company Transit to Stock Warehouse_2
3. From Stock Warehouse_2 to Customers

<img width="1224" alt="skitch 66" src="https://cloud.githubusercontent.com/assets/11341058/24103147/b7c2bfbc-0d54-11e7-955c-87247a10e0bd.png">

- Confirm the sale order. It must be created three pickings:

<img width="1226" alt="skitch 67" src="https://cloud.githubusercontent.com/assets/11341058/24103498/d90c9b38-0d55-11e7-97ff-f986df8cdd9b.png">

- Transfer first two pickings.

<img width="1230" alt="skitch 70" src="https://cloud.githubusercontent.com/assets/11341058/24104496/b7b0be8a-0d58-11e7-89a2-4331fceec1d8.png">

- Before transfer third picking, review that one move has reserved the quant correctly because was reserved from the previous pickings.

<img width="1215" alt="skitch 68" src="https://cloud.githubusercontent.com/assets/11341058/24103908/23952cc8-0d57-11e7-9346-bd48d7edb54a.png">

**Current behavior:**

When check availability of this third picking, the quant already reserved is moved to the other move.

<img width="1264" alt="skitch 69" src="https://cloud.githubusercontent.com/assets/11341058/24104056/8be11616-0d57-11e7-8763-a90507315b19.png">
 
**Expected behavior:**

When check availability of this third picking, the moves already reserved must not be altered.


addons/stock/stock.py
uom_qty = uom_obj._compute_qty_obj(cr, uid, move.product_id.uom_id, qty, move.product_uom, rounding_method='HALF-UP', context=context)
        uos_qty = uom_qty * move.product_uos_qty / move.product_uom_qty
        defaults = {
            'product_uom_qty': uom_qty,
            'product_uos_qty': uos_qty,
            'procure_method': 'make_to_stock',
            'restrict_lot_id': restrict_lot_id,
            'split_from': move.id,
            'procurement_id': move.procurement_id.id,
            'move_dest_id': move.move_dest_id.id,
            'origin_returned_move_id': move.origin_returned_move_id.id,
        }
        if restrict_partner_id:
            defaults['restrict_partner_id'] = restrict_partner_id
        if context.get('source_location_id'):
            defaults['location_id'] = context['source_location_id']
        new_move = self.copy(cr, uid, move.id, defaults, context=context)
        ctx = context.copy()
        ctx['do_not_propagate'] = True
        self.write(cr, uid, [move.id], {
            'product_uom_qty': move.product_uom_qty - uom_qty,
            'product_uos_qty': move.product_uos_qty - uos_qty,
        }, context=ctx)
        if move.move_dest_id and move.propagate and move.move_dest_id.state not in ('done', 'cancel'):
            new_move_prop = self.split(cr, uid, move.move_dest_id, qty, context=context)
            self.write(cr, uid, [new_move], {'move_dest_id': new_move_prop}, context=context)
        
        
        return self.action_confirm(cr, uid, [new_move], context=context)[0]
    def get_code_from_locs(self, cr, uid, move, location_id=False, location_dest_id=False, context=None):