K 10
svn:author
V 4
ache
K 8
svn:date
V 27
2016-05-22T06:18:59.166110Z
K 7
svn:log
V 456
1) POSIX prohibits printing errors to stderr here and require
returning NULL:

"Upon successful completion, initstate() and setstate() shall return a
pointer to the previous state array; otherwise, a null pointer shall
be returned.

Although some implementations of random() have written messages to
standard error, such implementations do not conform to POSIX.1-2008."

2) Move error detections earlier to prevent state modifying.

MFC after:      1 week

END