Fix some error output, replacing some silly 'warnx("\n...")' with
authorkrw <krw@openbsd.org>
Fri, 7 Oct 2022 19:59:19 +0000 (19:59 +0000)
committerkrw <krw@openbsd.org>
Fri, 7 Oct 2022 19:59:19 +0000 (19:59 +0000)
commit5cb1d9dce18f152bf9f5d7d4251dafe18a5c0c82
tree794e9593570a4ce354959dcf30953f85cb05d7a1
parentc45c688b6d76ed90e26bc1de5d9b53536eda8a05
Fix some error output, replacing some silly 'warnx("\n...")' with
fprintf(stderr, "\n...").

Reported by Michael Siegel via bugs@. ok tb@ (with some further suggestions)
usr.bin/cdio/rip.c