[LyX/master] Fix gcc 13 compilation.

[Pavel Sanda]

commit 6874c86cb58f4387734c97423bfe9a60cbaec247
Author: Pavel Sanda <sanda at lyx.org>
Date:   Tue Jun 28 10:26:42 2022 +0200

    Fix gcc 13 compilation.
    
    Spotted by Jose.
---
 src/tex2lyx/Parser.cpp |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/src/tex2lyx/Parser.cpp b/src/tex2lyx/Parser.cpp
index e4eb9b4..2fd1789 100644
--- a/src/tex2lyx/Parser.cpp
+++ b/src/tex2lyx/Parser.cpp
@@ -16,6 +16,7 @@
 #include "support/lstrings.h"
 #include "support/textutils.h"
 
+#include <cstdint>
 #include <iostream>
 
 using namespace std;