Fix build with libxml2 2.12

https://github.com/abrt/libreport/pull/801

801.patch

@@ -0,0 +1,42 @@
+From 9be0010e109d307921a049d10078813423227582 Mon Sep 17 00:00:00 2001
+From: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
+Date: Fri, 15 Dec 2023 18:03:33 +0100
+Subject: [PATCH] Fix compatibility with libxml2 2.12
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Since libxml2 2.12, xmlNodePtr is no longer included by libxml/encoding.h.
+This leads to build errors such as:
+
+      CC       reporter_mantisbt-reporter-mantisbt.o
+    In file included from reporter-mantisbt.c:22:
+    mantisbt.h:48:5: error: unknown type name ‘xmlNodePtr’
+       48 |     xmlNodePtr sr_root;
+          |     ^~~~~~~~~~
+    mantisbt.h:49:5: error: unknown type name ‘xmlNodePtr’
+       49 |     xmlNodePtr sr_body;
+          |     ^~~~~~~~~~
+    mantisbt.h:50:5: error: unknown type name ‘xmlNodePtr’
+       50 |     xmlNodePtr sr_method;
+          |     ^~~~~~~~~~
+
+Fix this by including libxml/tree.h.
+
+Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
+---
+ src/plugins/mantisbt.h | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/plugins/mantisbt.h b/src/plugins/mantisbt.h
+index 1feaf8f88..6979e7244 100644
+--- a/src/plugins/mantisbt.h
++++ b/src/plugins/mantisbt.h
+@@ -25,6 +25,7 @@ extern "C" {
+ #endif
+ 
+ #include <libxml/encoding.h>
++#include <libxml/tree.h>
+ #include "problem_report.h"
+ 
+ #define SOAP_STRING "ns2:string"

libreport.spec

@@ -19,6 +19,9 @@ Release: 3%{?dist}
 License: GPL-2.0-or-later
 URL: https://abrt.readthedocs.org/
 Source: https://github.com/abrt/%{name}/archive/%{version}/%{name}-%{version}.tar.gz
+# Fix compatibility with libxml2 2.12
+Patch:  https://github.com/abrt/%{name}/pull/801.patch
+
 BuildRequires: %{dbus_devel}
 BuildRequires: gtk3-devel
 BuildRequires: curl-devel
@@ -286,7 +289,7 @@ data over ftp/scp...
 %endif
 
 %prep
-%autosetup
+%autosetup -p1
 
 %build
 ./autogen.sh