Fix invalid strncpy use (#1675450)

Produces error on latest gcc.

netresolve-0.0.1-strncpy.patch

@@ -0,0 +1,29 @@
+From 08800e61eaba05265d3d976b0e9922f9bc4c63b2 Mon Sep 17 00:00:00 2001
+From: Petr Mensik <pemensik@redhat.com>
+Date: Mon, 18 Feb 2019 20:27:18 +0100
+Subject: [PATCH] Always produce zero terminated address
+
+---
+ lib/backend.c | 6 ++++--
+ 1 file changed, 4 insertions(+), 2 deletions(-)
+
+diff --git a/lib/backend.c b/lib/backend.c
+index 1b3dadc..b895651 100644
+--- a/lib/backend.c
++++ b/lib/backend.c
+@@ -287,8 +287,10 @@ netresolve_backend_add_path(netresolve_query_t query,
+ 
+ 	if (length)
+ 		memcpy(path.node.address, address, length);
+-	else
+-		strncpy(path.node.address, address, sizeof path.node.address);
++	else {
++		path.node.address[sizeof(path.node.address)-1] = 0;
++		strncpy(path.node.address, address, sizeof(path.node.address)-1);
++	}
+ 
+ 	if (query->request.servname && (!socktype || !protocol || !port)) {
+ 		struct path_data data = { .query = query, .path = &path };
+-- 
+2.20.1
+

netresolve.spec

@@ -2,7 +2,7 @@
 
 Name: netresolve
 Version: 0.0.1
-Release: 0.23%{?snapshot_suffix}%{?dist}
+Release: 0.24%{?snapshot_suffix}%{?dist}
 Summary: Generic name resolution library
 License: BSD
 # https://github.com/crossdistro/netresolve , possibly?
@@ -11,6 +11,7 @@ Source0: %{name}-0.0.1.tar.xz
 # Fix a syntax error in a test
 # From https://github.com/crossdistro/netresolve/pull/2
 Patch0: netresolve-0.0.1-test-equality.patch
+Patch1: netresolve-0.0.1-strncpy.patch
 
 BuildRequires: ldns-devel
 BuildRequires: pkgconfig(libcares)
@@ -233,6 +234,9 @@ make check || { cat ./test-suite.log; false; }
 %{_libdir}/libnss_netresolve.so
 
 %changelog
+* Tue Feb 19 2019 Petr Menšík <pemensik@redhat.com> - 0.0.1-0.24.20160317git
+- Fix build under new gcc (#1675450)
+
 * Fri Feb 01 2019 Fedora Release Engineering <releng@fedoraproject.org> - 0.0.1-0.23.20160317git
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass_Rebuild