Fix a handful of small one-time memory leaks in vbackup,
and one per-package memory leak (in writethread).
diff --git a/src/libdiskfs/ffs.c b/src/libdiskfs/ffs.c
index 7864c71..9607cfb 100644
--- a/src/libdiskfs/ffs.c
+++ b/src/libdiskfs/ffs.c
@@ -46,6 +46,7 @@
 	fsys->_readfile = ffsreadfile;
 	fsys->_readlink = ffsreadlink;
 	fsys->_readdir = ffsreaddir;
+	fsys->_close = ffsclose;
 	fsys->fileblock = ffsxfileblock;
 
 	if(ffssync(fsys) < 0)