There is an error return path that is not kfree'ing mh after
it has been successfully allocates.  Fix this by moving the
call to create_rcom to after the check on rc_in->rc_id check
to avoid this.

Thanks to Alexander Ahring Oder Aring for suggesting the
correct way to fix this.

Addresses-Coverity: ("Resource leak")
Fixes: a070a91c ("fs: dlm: add more midcomms hooks")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David Teigland <teigland@redhat.com>