Pierre-Yves David <pierre-yves.david@logilab.fr> [Wed, 07 Mar 2012 16:16:44 +0100] rev 8300
[storage/bfss] ensure bfss never remove a cw_edited item (closes #2236287)
When the <old value> == <new value> (not really and update but can happen), the
value was popped but never restored. The cw_edited attribut had wrong content
for a small time lapse.