Fixed possible access to an uninitialized field.
Fixed possible access to an uninitialized field.

The "recv_msg.incoming_buf" is checked after jumping to the "done" label
if nxt_socket_msg_oob_get_fds() returns an error.

Also moved initialization of "port_msg" near to its first usage.

Found by Coverity (CID 373899).

nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit,nginx/unit