Fix example compiling error on netlink-packet-core 0.6.0

Signed-off-by: Gris Ge <[email protected]>

Author: cathay4t

examples/list_generic_family.rs

@@ -41,7 +41,7 @@ fn main() {
                 .unwrap();
 
             match msg.payload {
-                NetlinkPayload::Done => break 'outer,
+                NetlinkPayload::Done(_) => break 'outer,
                 NetlinkPayload::InnerMessage(genlmsg) => {
                     if GenlCtrlCmd::NewFamily == genlmsg.payload.cmd {
                         print_entry(genlmsg.payload.nlas);