[pty] Fix ptsname_r fallback
ptsname_r
If posix_openpt is available, also ptsname should be available.
posix_openpt
ptsname
Added by nobu (Nobuyoshi Nakada) over 1 year ago
[pty] Fix
ptsname_rfallbackIf
posix_openptis available, alsoptsnameshould be available.