net-print/pnm2ppa: fix build w/ upcoming clang16

Closes: https://bugs.gentoo.org/874534
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

net-print/pnm2ppa/files/pnm2ppa-1.13-clang16.patch

@@ -0,0 +1,7 @@
+https://bugs.gentoo.org/874534
+--- a/ppa_protocol/parse_vlink.c
++++ b/ppa_protocol/parse_vlink.c
+@@ -1,2 +1,3 @@
+ #include <stdio.h>
++#include <string.h>
+ 

net-print/pnm2ppa/pnm2ppa-1.13-r2.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -26,7 +26,10 @@ RDEPEND="
 	syslog? ( virtual/logger )"
 DEPEND="${RDEPEND}"
 
-PATCHES=( "${FILESDIR}"/${P}-fno-common.patch )
+PATCHES=(
+	"${FILESDIR}"/${P}-fno-common.patch
+	"${FILESDIR}"/${P}-clang16.patch
+)
 
 src_configure() {
 	local lng i withval