- Fix a mistake : if a movement should be kept, this does not mean that we don't have to check for other movements. So in this way all movement will be checked.
- in case of no effective model found, getEffectiveModel return None. So remove all None values


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@28120 20353a03-c40f-0410-a6d1-a30d3c3de9de