[FIX] product: if 'date' is passed as False in context of price_get_multi(), it shoul...

lp bug: https://launchpad.net/bugs/1175983 fixed

bzr revid: rgo@tinyerp.com-20130517065744-il8sfm61rlcu9h2f

diff --cc addons/product/pricelist.py
index 4b59856,98a6239..0e25be6
--- 1/addons/product/pricelist.py
--- 2/addons/product/pricelist.py
+++ b/addons/product/pricelist.py
@@@ -151,8 -151,8 +151,8 @@@ class product_pricelist(osv.osv)
          if context is None:
              context = {}
  
--        date = time.strftime('%Y-%m-%d')
-         if 'date' in context:
++        date = context.get('date') or time.strftime('%Y-%m-%d')
+         if 'date' in context and context['date']:
              date = context['date']
  
          currency_obj = self.pool.get('res.currency')