Fix reads on large-ish files in MemoryFS
Fix reads on large-ish files in MemoryFS

EtiennePerot/fuse-jna,vicky-katara/fuse-jna,vicky-katara/fuse-jna,EtiennePerot/fuse-jna,vicky-katara/fuse-jna,EtiennePerot/fuse-jna