chromecast: move buildMessage() in the class

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

modules/stream_out/chromecast/chromecast.h

@@ -114,6 +114,10 @@ struct intf_sys_t
 private:
     int sendMessage(castchannel::CastMessage &msg);
 
+    castchannel::CastMessage buildMessage(std::string namespace_,
+                                         castchannel::CastMessage_PayloadType payloadType,
+                                         std::string payload, std::string destinationId = DEFAULT_CHOMECAST_RECEIVER);
+
     enum connection_status conn_status;
 
     unsigned i_requestId;

modules/stream_out/chromecast/chromecast_ctrl.cpp

@@ -52,9 +52,9 @@
  * @param destinationId the destination idenifier
  * @return the generated CastMessage
  */
-static castchannel::CastMessage buildMessage(std::string namespace_,
-                                castchannel::CastMessage_PayloadType payloadType,
-                                std::string payload, std::string destinationId = DEFAULT_CHOMECAST_RECEIVER)
+castchannel::CastMessage intf_sys_t::buildMessage(std::string namespace_,
+                                                 castchannel::CastMessage_PayloadType payloadType,
+                                                 std::string payload, std::string destinationId)
 {
     castchannel::CastMessage msg;