net-dns/ndu: fix build with GCC 11

Closes: https://bugs.gentoo.org/786276
Signed-off-by: Sam James <sam@gentoo.org>

net-dns/ndu/files/ndu-0.4-fix-pointer-comparison-with-0.patch

@@ -0,0 +1,26 @@
+From 5df37d4e6a22a67671a4b74c68e725a9001fbac1 Mon Sep 17 00:00:00 2001
+From: Sam James <sam@gentoo.org>
+Date: Tue, 15 Jun 2021 02:38:33 +0000
+Subject: [PATCH] Fix pointer comparison with 0
+
+Closes: https://bugs.gentoo.org/786276
+---
+ src/ndu.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/ndu.cpp b/src/ndu.cpp
+index 558ee45..8d3b353 100644
+--- a/src/ndu.cpp
++++ b/src/ndu.cpp
+@@ -404,7 +404,7 @@ public:
+ 		{
+ 			// see if file is a reverse file
+ 			// if the zone ends in .in-addr.arpa
+-			if(strstr(name->pchar(), IN_ADDR_ARPA) > 0)
++			if(strstr(name->pchar(), IN_ADDR_ARPA) != 0)
+ 			{
+ 				zoneType = 1;
+ 			}
+-- 
+2.32.0
+

net-dns/ndu/ndu-0.4-r4.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -12,13 +12,14 @@ HOMEPAGE="https://wiki.gentoo.org/wiki/No_homepage"
 LICENSE="GPL-2"
 SLOT="0"
 KEYWORDS="amd64 ppc x86"
-IUSE=""
 
 RDEPEND="sys-apps/ed" # dnstouch calls ed to do the dirty work
 
 src_prepare() {
 	default
+
 	eapply "${FILESDIR}"/${P}-binary-locations.patch
+	eapply "${FILESDIR}"/${P}-fix-pointer-comparison-with-0.patch
 
 	# match our bind config
 	sed -e 's|0.0.127.in-addr.arpa|127.in-addr.arpa|g' -i ndu.conf || die