[Bug] sdiff-2.8.1: wrong subsidiary program check

[Takashi Matsuda]

Hello.

In my environment (cygwin 1.3.12), sdiff aborts execution finally,
saying "subsidiary program `...' failed", even if it seems run
normally.

I read the source of sdiff 2.8.1 and found one problem.
In the function "sdiff.c:1220:ck_editor_status()", it check the
error situation by the code "if (errno | status)".
IMHO, "status == 0" does not meen the normal situation in all 
environment, at least cygwin.

Regards,

--
Takashi Matsuda
address@hidden