Always pass 9 parameters to tparm()

[mptre]

Some implementations like NetBSD have a non-variadic prototype of
tparm() requiring 9 explicit parameters. Therefore always make sure to
pass 9 parameters. Since other implementations uses a variadic prototype
it will work on them as well.

Inspired by how this solved in the portable version of tmux.

[ghost]

It works, but gcc (nb2 20150115) 4.8.5 on NetBSD 7.1 complains again:

pick.c:315:4: error: passing argument 1 of 'tty_parm1' discards 'const' qualifier from pointer target type [-Werror]

so it should be tty_parm1(const char *, int) ... and please rename it to tty_parm or tty_tparm :-)

[mptre]

so it should be tty_parm1(const char *, int)

Well that doesn't work on OpenBSD since:

char *tparm(char *, ...);

... and on NetBSD:

char *tparm(const char *, ...);

It's not pretty but the updated commit should work, please confirm.

[ghost]

Confirmed.

[mptre]

Thanks, merged.