When compacting use InternalUserComparator instead of the user supplied comparator
When compacting use InternalUserComparator instead of the user supplied comparator

cdapio/leveldb,archiecobbs/leveldb,kenwenzel/leveldb,kenwenzel/leveldb,rnarubin/leveldb,maxboehm/leveldb,gaoch023/leveldb-1,zhengkejun/leveldb,xuzha/leveldb,ljyloo/leveldb,dain/leveldb,mashuai/leveldb