Tweak the new evutil_weakrand_() code

Make its state actually get seeded.

Document it more thoroughly.

Turn its state into a structure.

Fix a bug in evutil_weakrand_range_() where it could return the top of
the range.

Change its return type to ev_int32_t.

Add a quick unit test to make sure that the value of
evutil_weakrand_range_() is in range.

1 files changed, 2 insertions, 0 deletions

diff --git a/poll.c b/poll.c
index 3ac427ac..01144854 100644
--- a/poll.c
+++ b/poll.c
@@ -93,6 +93,8 @@ poll_init(struct event_base *base)
 
 	evsig_init_(base);
 
+	evutil_weakrand_seed_(&base->weakrand_seed, 0);
+
 	return (pollop);
 }