tryopen: include errno.h header just in case
commit8b4df8ece93ddc4e2fb685905461c1ed27b22295
authorEric Wong <normalperson@yhbt.net>
Wed, 21 Nov 2012 23:16:00 +0000 (21 23:16 +0000)
committerEric Wong <normalperson@yhbt.net>
Wed, 21 Nov 2012 23:16:00 +0000 (21 23:16 +0000)
tree3df0f6ed433393d1714384769324ed77b6a5061a
parentf020550fc802f299fdcdec695ac80d53ef3d24d9
tryopen: include errno.h header just in case

errno.h is not guaranteed to be included in existing headers,
so we need to #include it to ensure errno and friends are
usable.

Thanks to stuart on the kgio mailing list for noticing
ref: <062571308.133355.1353536890665.JavaMail.sas1@172.29.251.236>
ext/kgio/tryopen.c