xfs_repair: fix messaging when fixing imap due to sparse cluster

xfs_repair: fix messaging when fixing imap due to sparse cluster

This logic is wrong -- if we're in verbose dry-run mode, we do NOT want
to say that we're correcting the imap.  Otherwise, we print things like:

imap claims inode XXX is present, but inode cluster is sparse,

But then we can erroneously tell the user that we would correct the
imap when in fact we /are/ correcting it.

Fixes: f4ff8086586 ("xfs_repair: don't crash on partially sparse inode clusters")
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Carlos Maiolino <cmaiolino@redhat.com>
Signed-off-by: Carlos Maiolino <cem@kernel.org>