peer: avoid possible GC leak by setting popped queue element to nil

peer.go

@@ -537,6 +537,7 @@ func (c *chanMsgStream) msgConsumer() {
 		// slice's reference down one in order to remove the message
 		// from the queue.
 		msg := c.msgs[0]
+		c.msgs[0] = nil // Set to nil to prevent GC leak.
 		c.msgs = c.msgs[1:]
 
 		// We'll send a message to the funding manager and wait iff an
@@ -859,6 +860,9 @@ func (p *peer) queueHandler() {
 		// If there weren't any messages to send, or the writehandler
 		// is still blocked, then we'll accept a new message into the
 		// queue from outside sub-systems.
+		//
+		// TODO(roasbeef): need send clause here as well to account for
+		// writeHandler blocking?
 		select {
 		case <-p.quit:
 			return