Only dispatch_async on limelight-common's threads

Limelight/Stream/Connection.m

@@ -275,7 +275,7 @@ void ClDisplayTransientMessage(char* message)
     [_callbacks displayTransientMessage: message];
 }
 
--(void) terminate
+-(void) terminateInternal
 {
     // We dispatch this async to get out because this can be invoked
     // on a thread inside common and we don't want to deadlock
@@ -285,6 +285,13 @@ void ClDisplayTransientMessage(char* message)
     });
 }
 
+-(void) terminate
+{
+    // We're guaranteed to not be on a limelight-common thread
+    // here so it's safe to call stop directly
+    LiStopConnection();
+}
+
 -(id) initWithConfig:(StreamConfiguration*)config renderer:(VideoDecoderRenderer*)myRenderer connectionCallbacks:(id<ConnectionCallbacks>)callbacks
 {
     self = [super init];