if no organisation mapping is defined and more than one organisation exists for the current group, use the currency from any of them, they should be consistent (otherwise, a report at this level of group will show mixed currencies anyway)

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27478 20353a03-c40f-0410-a6d1-a30d3c3de9de