Remove unnecessary cast in kevent_delete

Fixes the build on NetBSD where the compiler complains about casting NULL
to (int).

Signed-off-by: Martin Lucina <mato@kotelna.sk>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/kqueue.cpp b/src/kqueue.cpp
index e1fe2fa..86377e7 100644
--- a/src/kqueue.cpp
+++ b/src/kqueue.cpp
@@ -74,7 +74,7 @@ void zmq::kqueue_t::kevent_delete (fd_t fd_, short filter_)
 {
     struct kevent ev;
 
-    EV_SET (&ev, fd_, filter_, EV_DELETE, 0, 0, (kevent_udata_t)NULL);
+    EV_SET (&ev, fd_, filter_, EV_DELETE, 0, 0, 0);
     int rc = kevent (kqueue_fd, &ev, 1, NULL, 0, NULL);
     errno_assert (rc != -1);
 }