[kaffe] updated version of irix problems

[Riccardo]

Here:

In file included from /nfs_mount/kaffe_cvs/kaffe/config/config-io.h:30,
                 from /nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/
unix-jthreads/jthread.h:36,
                 from /nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/
unix-jthreads/signal.c:18:
/usr/include/sys/ioctl.h:59: warning: redundant redeclaration of `ioctl' 
in same scope
/usr/freeware/lib/gcc-lib/mips-sgi-irix6.2/2.95.2/include/unistd.h:356: 
warning: previous declaration of `ioctl'
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c:
39: parse error before `('
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c: 
In function `jthread_initexceptions':
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c:
61: `nullException' undeclared (first use in this function)
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c:
61: (Each undeclared identifier is reported only once
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c:
61: for each function it appears in.)
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c: 
At top level:
/nfs_mount/kaffe_cvs/kaffe/kaffe/kaffevm/systems/unix-jthreads/signal.c:
79: parse error before `('


-Riccardo