rdp: fix leak when listener implantation fails

We've already allocated the listener by the time we hit this failure,
so we must exit through the path that frees it.

Co-authored-by: Steve Pronovost <spronovo@microsoft.com>
Co-authored-by: Brenton DeGeer <brdegeer@microsoft.com>
Signed-off-by: Hideyuki Nagase <hideyukn@microsoft.com>
Signed-off-by: Steve Pronovost <spronovo@microsoft.com>
Signed-off-by: Brenton DeGeer <brdegeer@microsoft.com>

libweston/backend-rdp/rdp.c

@@ -1342,7 +1342,7 @@ rdp_backend_create(struct weston_compositor *compositor,
 		}
 
 		if (rdp_implant_listener(b, b->listener) < 0)
-			goto err_compositor;
+			goto err_listener;
 	} else {
 		/* get the socket from RDP_FD var */
 		fd_str = getenv("RDP_FD");