if no organisation mapping is defined and more than one organisation exists...

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