9wm: Update to 1.4.2

There are no release notes from upstream, here is a partial list of changes
from the git commit log:

- Use sigaction(), not signal(), for SIGCHLD.
- Don't mix declarations and code.

wm/9wm/Makefile

@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.21 2020/01/18 21:40:24 nia Exp $
+# $NetBSD: Makefile,v 1.22 2022/05/18 19:48:23 nikita Exp $
 
-DISTNAME=		9wm-1.4.1
+DISTNAME=		9wm-1.4.2
 CATEGORIES=		plan9 wm
 MASTER_SITES=		${MASTER_SITE_GITHUB:=9wm/}
 

wm/9wm/distinfo

@@ -1,6 +1,7 @@
-$NetBSD: distinfo,v 1.8 2021/10/26 11:25:09 nia Exp $
+$NetBSD: distinfo,v 1.9 2022/05/18 19:48:23 nikita Exp $
 
-BLAKE2s (9wm-1.4.1.tar.gz) = 08d01902333427f9869e5d764da6afbb92c7952b1ff3ba1ffa34af8b2552acea
-SHA512 (9wm-1.4.1.tar.gz) = 6d07ac44ba1b5171e24bfc2acfebf33207e030bdfd2ed5c18e2a5c9e59f4bf215d6e6148874bcfa95f50fbb218af48cfaeb7604dbb651d35cefe83860ae3fcb9
-Size (9wm-1.4.1.tar.gz) = 22021 bytes
+BLAKE2s (9wm-1.4.2.tar.gz) = c0b70605bae374d6bdb8603b1e064bdf95291331425d2bec753697bf9ccfe191
+SHA512 (9wm-1.4.2.tar.gz) = 4ea27b4a0851519fd1a8ccbd9e4c19addd592a2cd0a5dd1b077661564594b1ceb653cd8ec304ee56654cefa922514a02b041ad3d3639ef43efdb830cdec7485e
+Size (9wm-1.4.2.tar.gz) = 22099 bytes
 SHA1 (patch-9wm.c) = 0e3c31b6cd872426a9be8b9e27294eee83da9712
+SHA1 (patch-grab.c) = 931076087bb8ee4b83c7a52ef52ac36ce7b69d22

wm/9wm/patches/patch-grab.c

@@ -0,0 +1,14 @@
+$NetBSD: patch-grab.c,v 1.1 2022/05/18 19:48:23 nikita Exp $
+
+Fix warnings related to select().
+
+--- grab.c.orig	2022-05-18 21:37:30.561383566 +0200
++++ grab.c	2022-05-18 21:38:11.578614585 +0200
+@@ -2,6 +2,7 @@
+  * Copyright multiple authors, see README for licence details
+  */
+ #include <stdio.h>
++#include <sys/select.h>
+ #include <X11/X.h>
+ #include <X11/Xos.h>
+ #include <X11/Xlib.h>