msg: fix out_port setting
msg: fix out_port setting

Fix out_port setting in MultipartRequestAggregate

Signed-off-by: Stepanov Evgeniy <be3de3bd07bc0e6f7c7235242d1477827e7e64b3@arccn.ru>

OpenNetworkingFoundation/libfluid_msg,ARCCN/libfluid_msg,ARCCN/libfluid_msg,OpenNetworkingFoundation/libfluid_msg,ARCCN/libfluid_msg,OpenNetworkingFoundation/libfluid_msg