convert: fixed search="[]" case, broken at 3342ff0845b211d
convert: fixed search="[]" case, broken at 3342ff0845b211d

When browse(cr, uid, search(q)) was converted to browse(cr, uid, q),
I forgot that [] is a special case where in browse means None, but
in search means "all".

xrg/openerp-server,xrg/openerp-server