Configuration:
- Company Currency: MXN
- Tax 16%.
- Multicurrency, MXN and USD.
- Decimal precision: 4
- Currency Data:
MXN: rate 1.0
USD rates

| Database time | rate | Local time (Mexico) | 
| --- | --- | --- |
| 2016-09-09 00:00:01 | 0.054440 | 2016-09-08 17:00:01 |
| 2016-10-11 00:00:01 | 0.051815 | 2016-10-10 17:00:01 |

Steps to reproduce:

1. Create an invoice for 600 USD  + tax (16%) with date 09/09/16 (September 9, 2016) and when you validate in the journal entry is $12,784.7172 MXN.
3. Create a bank statement in MXN and add a line with date 11/10/16 (October 11, 2016) and amount $13,372.80 MXN.
4. When reconcile select the invoice and there is a difference ($588.0828 MXN) add a line with the difference and select an account for the difference. 
<img width="607" alt="captura de pantalla 2016-11-04 a la s 17 23 26" src="https://cloud.githubusercontent.com/assets/6758279/20025385/749605a2-a2b3-11e6-8b1a-4e9fbf1521ed.png">

**Note that the amount of difference is $588.08 in when you select the account**

5. Click on reconcile.

Expected behavior:
- Reconcile the invoice and create account move.

Current behavior:
- Raise an error  `Wrong credit or debit value in accounting entry !`

![captura de pantalla 2016-11-01 a la s 19 18 52](https://cloud.githubusercontent.com/assets/6758279/19913537/1c272866-a069-11e6-9b06-5851681c7fa5.png)

addons/account/models/account_move.py
""" Create analytic items upon validation of an account.move.line having an analytic account. This
            method first remove any existing analytic item related to the line before creating any new one.
        """
        for obj_line in self:
            if obj_line.analytic_line_ids:
                obj_line.analytic_line_ids.unlink()
            if obj_line.analytic_account_id:
                vals_line = obj_line._prepare_analytic_line()[0]
                self.env['account.analytic.line'].create(vals_line)
    @api.one
    def _prepare_analytic_line(self):
        """ Prepare the values used to create() an account.analytic.line upon validation of an account.move.line having
            an analytic account. This method is intended to be extended in other modules.
        """
        amount = (self.credit or 0.0) - (self.debit or 0.0)
        return {
            'name': self.name,
            'date': self.date,
            'account_id': self.analytic_account_id.id,
            'unit_amount': self.quantity,
            'product_id': self.product_id and self.product_id.id or False,
            'product_uom_id': self.product_uom_id and self.product_uom_id.id or False,
            'amount': self.company_currency_id.with_context(date=self.date or fields.Date.context_today(self)).compute(amount, self.analytic_account_id.currency_id) if self.analytic_account_id.currency_id else amount,
            'general_account_id': self.account_id.id,
            'ref': self.ref,
            'move_id': self.id,
            'user_id': self.invoice_id.user_id.id or self._uid,
        }
    @api.model
    def _query_get(self, domain=None):