`dev_bsize' must be reset to 1 before the bread() or

quotacheck -a will fail after the first partition (because
    dev_bsize is 512 and is messes up the superblock read of the second
    partition)

Submitted by:	dillon@best.com (Mattew Dillon)

sbin/quotacheck/quotacheck.c

@@ -260,6 +260,7 @@ chkquota(fsname, mntpt, qnp)
 		(void)printf(" quotas for %s (%s)\n", fsname, mntpt);
 	}
 	sync();
+	dev_bsize = 1;
 	bread(SBOFF, (char *)&sblock, (long)SBSIZE);
 	dev_bsize = sblock.fs_fsize / fsbtodb(&sblock, 1);
 	maxino = sblock.fs_ncg * sblock.fs_ipg;