Added some sanity checks and debug prints for the problem when reloading shareds after renaming leads to assertions regarding number of hashes stored in existing known files

see http://amule.forumer.com/assertion-failed-t2347794.html

git-svn-id: http://amule.googlecode.com/svn/trunk@10830 6ea3b165-b8b8-dda6-0cea-db2f03e7d5ff