mkfs: merge getnum

getnum() is now only called by getnum_checked(). Move the two
together into a single getnum() function and change all the callers
back to getnum().

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Jan Tulak <jtulak@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

3 files changed