[FIX] account: default statement line date as today if do not get context date

bzr revid: rgo@tinyerp.com-20120315134726-mzj01bzjveptcmhc

diff --cc addons/account/account_bank_statement.py
index 41ea441,41ea441..bef56c6
--- 1/addons/account/account_bank_statement.py
--- 2/addons/account/account_bank_statement.py
+++ b/addons/account/account_bank_statement.py
@@@ -472,7 -472,7 +472,7 @@@ class account_bank_statement_line(osv.o
      }
      _defaults = {
          'name': lambda self,cr,uid,context={}: self.pool.get('ir.sequence').get(cr, uid, 'account.bank.statement.line'),
--        'date': lambda self, cr, uid, context, *a: context.get('date'),
++        'date': lambda self, cr, uid, context, *a: context.get('date') or time.strftime('%Y-%m-%d'),
          'type': 'general',
      }