Merge pull request #672 from woodsaj/fixDeadlock

close call.timeout to prevent deadlock.

AUTHORS

@@ -64,3 +64,4 @@ Artem Chernyshev <artem.0xD2@gmail.com>
 Ference Fu <fym201@msn.com>
 LOVOO <opensource@lovoo.com>
 nikandfor <nikandfor@gmail.com>
+Anthony Woods <awoods@raintank.io>

conn.go

@@ -570,6 +570,7 @@ func (c *Conn) exec(req frameWriter, tracer Tracer) (*framer, error) {
 
 	select {
 	case err := <-call.resp:
+		close(call.timeout)
 		if err != nil {
 			if !c.Closed() {
 				// if the connection is closed then we cant release the stream,