Fix invalid memory access in MasterServer::recover()
Fix invalid memory access in MasterServer::recover()

This was introduced in 82b3ed7c15b07e4f65019c829fe785d61cfbe532.

Frank-Wu/RamCloud,y-higuchi/ramcloud,taschik/ramcloud,alexandermerritt/ramcloud,jblomer/ramcloud,jblomer/ramcloud,jcarreira/ramcloud,utah-scs/RAMCloud,SMatsushi/RAMCloud,utah-scs/RAMCloud,behnamm/cs244b_project,Frank-Wu/RamCloud,y-higuchi/ramcloud,jblomer/ramcloud,alexandermerritt/ramcloud,mrdiegoa/ramcloud,Frank-Wu/RamCloud,anirajk/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,Frank-Wu/RamCloud,alexandermerritt/ramcloud,taschik/ramcloud,IMCG/RamCloud,jblomer/ramcloud,Frank-Wu/RamCloud,utah-scs/RAMCloud,jblomer/ramcloud,behnamm/cs244b_project,anirajk/RAMCloud,y-higuchi/ramcloud,IMCG/RamCloud,SMatsushi/RAMCloud,DavidLi2010/ramcloud,IMCG/RamCloud,taschik/ramcloud,SMatsushi/RAMCloud,matrix207/RAMCloud,rstutsman/RAMCloud,taschik/ramcloud,jblomer/ramcloud,mrdiegoa/ramcloud,mrdiegoa/ramcloud,jcarreira/ramcloud,mrdiegoa/ramcloud,QingkaiLu/RAMCloud,QingkaiLu/RAMCloud,matrix207/RAMCloud,DavidLi2010/ramcloud,SMatsushi/RAMCloud,QingkaiLu/RAMCloud,Frank-Wu/RamCloud,QingkaiLu/RAMCloud,alexandermerritt/ramcloud,rstutsman/RAMCloud,jcarreira/ramcloud,DavidLi2010/ramcloud,DavidLi2010/ramcloud,y-higuchi/ramcloud,IMCG/RamCloud,taschik/ramcloud-load-manager,taschik/ramcloud-load-manager,anirajk/RAMCloud,behnamm/cs244b_project,utah-scs/RAMCloud,SMatsushi/RAMCloud,behnamm/cs244b_project,mrdiegoa/ramcloud,utah-scs/RAMCloud,IMCG/RamCloud,anirajk/RAMCloud,anirajk/RAMCloud,behnamm/cs244b_project,alexandermerritt/ramcloud,mrdiegoa/ramcloud,SMatsushi/RAMCloud,taschik/ramcloud-load-manager,taschik/ramcloud-load-manager,matrix207/RAMCloud,rstutsman/RAMCloud,jcarreira/ramcloud,anirajk/RAMCloud,behnamm/cs244b_project,IMCG/RamCloud,y-higuchi/ramcloud,taschik/ramcloud,matrix207/RAMCloud,DavidLi2010/ramcloud,jcarreira/ramcloud,rstutsman/RAMCloud,jcarreira/ramcloud,rstutsman/RAMCloud,y-higuchi/ramcloud,QingkaiLu/RAMCloud,utah-scs/RAMCloud,DavidLi2010/ramcloud,matrix207/RAMCloud,taschik/ramcloud-load-manager,alexandermerritt/ramcloud,QingkaiLu/RAMCloud