Fix the following -Werror warning from clang 10.0.0 in newfs_msdos:

sbin/newfs_msdos/newfs_msdos.c:181:2: error: misleading indentation; statement is not part of the previous 'if' [-Werror,-Wmisleading-indentation]

if (o.align) {
^

sbin/newfs_msdos/newfs_msdos.c:179:5: note: previous statement is here

if (argc < 1 || argc > 2)
^

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