commit fd39397

Don't forward outdated typing timeouts

The channel might have been parted, or the user might have parted from
the channel before receiving the timeout from Typings, thus causing a
segfault.

 1@@ -498,12 +498,20 @@ func (s *Session) run() {
 2 				err = s.handleStart(msg)
 3 			}
 4 		case t, ok := <-s.typings.Stops():
 5+			if !ok {
 6+				break
 7+			}
 8+			u, ok := s.users[t.Name]
 9+			if !ok {
10+				break
11+			}
12+			c, ok := s.channels[t.Target]
13 			if !ok {
14 				break
15 			}
16 			s.evts <- TagEvent{
17-				User:   s.users[t.Name].Name,
18-				Target: s.channels[t.Target].Name,
19+				User:   u.Name,
20+				Target: c.Name,
21 				Typing: TypingDone,
22 				Time:   time.Now(),
23 			}