[FIX] account: avoid tax on name search to execute request with empty journal (if...

bzr revid: mat@openerp.com-20140422135012-6faelx7cf0p8cvab

diff --cc addons/account/account.py
index e18df8a,36d0ba0..6368149
--- 1/addons/account/account.py
--- 2/addons/account/account.py
+++ b/addons/account/account.py
@@@ -1956,15 -1956,15 +1956,17 @@@ class account_tax(osv.osv)
          return super(account_tax, self).write(cr, uid, ids, vals, context=context)
  
      def search(self, cr, uid, args, offset=0, limit=None, order=None, context=None, count=False):
++        if context is None:
++            context = {}
          journal_pool = self.pool.get('account.journal')
  
--        if context and context.has_key('type'):
++        if context.get('type'):
              if context.get('type') in ('out_invoice','out_refund'):
                  args += [('type_tax_use','in',['sale','all'])]
              elif context.get('type') in ('in_invoice','in_refund'):
                  args += [('type_tax_use','in',['purchase','all'])]
  
-         if context and context.has_key('journal_id'):
 -        if context and context.get('journal_id'):
++        if context.get('journal_id'):
              journal = journal_pool.browse(cr, uid, context.get('journal_id'))
              if journal.type in ('sale', 'purchase'):
                  args += [('type_tax_use','in',[journal.type,'all'])]