static pfil_hook_t pfh_hook;
-static void register_hook() {
+static void register_hook(void) {
struct pfil_hook_args pha;
struct pfil_link_args pla;
hook_added = true;
}
-static void unregister_hook() {
+static void unregister_hook(void) {
if (!hook_added) return;
pfil_remove_hook(pfh_hook);
}