commit 67d7ddded32 (waitid(2): leave copyout of siginfo to syscall itself) breaks glibc posix/tst-waitid

[Markus Trippelsdorf]

Since:
 commit 67d7ddded322db99f451a7959d56ed6c70a6c4aa
 Author: Al Viro <v...@zeniv.linux.org.uk>
 Date:   Sun May 14 20:53:13 2017 -0400

     waitid(2): leave copyout of siginfo to syscall itself

the glibc posix/tst-waitid.c testcase fails:

markus@x4 glibc-build % ./posix/tst-waitid
waitid WNOHANG on stopped status 0

-- 
Markus