https://bugs.gentoo.org/899750
https://github.com/KhronosGroup/OpenCOLLADA/pull/656

From 84c8c9a02b4e5fe40465034563cb36527e865dac Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Mon, 11 Jul 2022 21:33:11 +0100
Subject: [PATCH] DAEValidator: fix gcc-13 build

On gcc-13 c++ headers don't include <stdint.h> implicitly any more.
This exposed build failure as:

    /build/source/DAEValidator/library/src/XmlDoc.cpp: In member function 'virtual void opencollada::XmlDoc::readFile(const std::string&)':
    /build/source/DAEValidator/library/src/XmlDoc.cpp:59:17: error: 'uint32_t' was not declared in this scope
       59 |                 uint32_t signature = *reinterpret_cast<const uint32_t*>(content.data());
          |                 ^~~~~~~~
--- a/DAEValidator/library/src/DaeValidator.cpp
+++ b/DAEValidator/library/src/DaeValidator.cpp
@@ -4,6 +4,7 @@
 #include "Strings.h"
 #include "StringUtil.h"
 #include <cmath>
+#include <cstdint>
 #include "no_warning_iomanip"
 #include "no_warning_iostream"
 #include <set>
--- a/DAEValidator/library/src/XmlDoc.cpp
+++ b/DAEValidator/library/src/XmlDoc.cpp
@@ -1,5 +1,6 @@
 #include "Macros.h"
 
+#include <cstdint>
 #if IS_GNUC_AND_GNUC_VERSION_LT(5,1,1)
 #include <cstring>
 #endif