accounts : fix quit channel goroutine leak

accounts/keystore/keystore.go

@@ -358,7 +358,7 @@ func (ks *KeyStore) TimedUnlock(a accounts.Account, passphrase string, timeout t
 		close(u.abort)
 	}
 	if timeout > 0 {
-		u = &unlocked{Key: key, abort: make(chan struct{})}
+		u = &unlocked{Key: key, abort: make(chan struct{}, 1)}
 		go ks.expire(a.Address, u, timeout)
 	} else {
 		u = &unlocked{Key: key}

accounts/keystore/watch.go

@@ -37,7 +37,7 @@ func newWatcher(ac *accountCache) *watcher {
 	return &watcher{
 		ac:   ac,
 		ev:   make(chan notify.EventInfo, 10),
-		quit: make(chan struct{}),
+		quit: make(chan struct{}, 1),
 	}
 }