[CM] snd on s390x (probably a BigEndian issue)

[bil at ccrma.Stanford.EDU]

The error is hit in init_rootlet before the error_hook is set up,
so it segfaults when it tries to call the error_hook.  The line
number given in init_roolet is bogus, so I can't tell where it is.
Actually a lot of stuff is messed up.  I guess we'll just have
to disappoint the IBM mainframe guys.  Back in 1969 (was
it really more than 50 years ago?) I wrote some code (I
think it was Basic, maybe Fortran) on an IBM mainframe
(probably a 360?) -- I vaguely remember the typewriter
(was it a typewriter?) had round keys??