rt_frtchord: fixed inconsistent ring
rt_frtchord: fixed inconsistent ring

when nodes died, sometimes the resulting ring after periodic stabilization was
inconsistent. this happened due to wrong adjacent finger pointers.

git-svn-id: d89f83fc72fb49d2f5b112dfb73cea192610bdff@3789 71766da9-9752-0410-ab17-bfafa751c56a

fredrikelinder/scalaris,fredrikelinder/scalaris,fredrikelinder/scalaris,fredrikelinder/scalaris,fredrikelinder/scalaris,fredrikelinder/scalaris