[trunk][mrp] stock_move.action_consume raises exception

In the mrp modul's Manufacturing Order form clicking on the "Produce" then the "Confirm" buttons raises an AttributeError exception with the message 'stock.move' object has no attribute 'split_lines'. This occurs only if there are raw materials in the BOM list on which the "Track Manufacturing Lots" attribute is checked.
The problem seems to be the result of some untested and incomplete refactoring. (Probably at revision 3038.1.7)

The traceback is as follows:

Traceback (most recent call last):
  File "/home/tomi/openerp/server/bin/netsvc.py", line 489, in dispatch
    result = ExportService.getService(service_name).dispatch(method, auth, params)
  File "/home/tomi/openerp/server/bin/service/web_services.py", line 586, in dispatch
    res = fn(db, uid, *params)
  File "/home/tomi/openerp/server/bin/osv/osv.py", line 57, in wrapper
    return f(self, dbname, *args, **kwargs)
  File "/home/tomi/openerp/server/bin/osv/osv.py", line 140, in execute
    res = pool.execute_cr(cr, uid, obj, method, *args, **kw)
  File "/home/tomi/openerp/server/bin/osv/osv.py", line 130, in execute_cr
    return getattr(object, method)(cr, uid, *args, **kw)
  File "/home/tomi/openerp/addons/mrp/wizard/mrp_product_produce.py", line 72, in do_produce
    data['product_qty'], data['mode'], context=context)
  File "/home/tomi/openerp/addons/mrp/mrp.py", line 684, in action_produce
    stock_mov_obj.action_consume(cr, uid, [raw_product.id], consumed_qty, production.location_src_id.id, context=context)
  File "/home/tomi/openerp/addons/mrp/stock.py", line 109, in action_consume
    new_moves = super(StockMove, self).action_consume(cr, uid, [move.id], product_qty, location_id, context=context)
  File "/home/tomi/openerp/addons/stock/stock.py", line 2234, in action_consume
    res += self.split_lines(cr, uid, [move.id], quantity_rest, split_by_qty=1, context=context)
AttributeError: 'stock.move' object has no attribute 'split_lines'