existential fixes for the synchronous API

HubConnectionOptions.go

@@ -11,7 +11,7 @@ type HubConnectionOptions struct {
 	NumEventsToBuffer uint
 
 	// Returning messages in sync mode
-	OnEventSync func(HubEvent)
+	OnEventSync func(*HubConnection, HubEvent)
 }
 
 func (this *HubConnectionOptions) prepareConnection() *HubConnection {
@@ -54,5 +54,9 @@ func (this *HubConnectionOptions) Connect() *HubConnection {
 // Client code should supply an event handling function as hco.OnEventSync.
 func (this *HubConnectionOptions) ConnectSync() {
 	hc := this.prepareConnection()
+	hc.OnEvent = nil
+	hc.processEvent = func(ev HubEvent) {
+		this.OnEventSync(hc, ev)
+	}
 	hc.worker()
 }