**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
''' Implementation of removal strategies
            If it can not reserve, it will return a tuple (None, qty)
        '''
        if context is None:
            context = {}
        domain += location and [('location_id', 'child_of', location.id)] or []
        domain += [('product_id', '=', product.id)]
        if context.get('force_company'):
            domain += [('company_id', '=', context.get('force_company'))]
        else:
            domain += [('company_id', '=', self.pool.get('res.users').browse(cr, uid, uid, context=context).company_id.id)]
        res = []
        offset = 0
        while float_compare(quantity, 0, precision_rounding=product.uom_id.rounding) > 0:
            quants = self.search(cr, uid, domain, order=orderby, limit=10, offset=offset, context=context)
            if not quants:
                res.append((None, quantity))
                break
            for quant in self.browse(cr, uid, quants, context=context):
                rounding = product.uom_id.rounding
                if float_compare(quantity, abs(quant.qty), precision_rounding=rounding) >= 0:
                    res += [(quant, abs(quant.qty))]
                    quantity -= abs(quant.qty)
                elif float_compare(quantity, 0.0, precision_rounding=rounding) != 0:
                    res += [(quant, quantity)]
                    quantity = 0
                    break
            offset += 10
        return res
    def _check_location(self, cr, uid, location, context=None):