misc: fix build on absence of magic.h

If magic.h is not present, there will be unresolved references to the magic_t
type in plausible.c. Fix that by moving the protecting #ifdef directive.

Signed-off-by: Artemiy Volkov <artemiyv@acm.org>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
1 file changed