zint: fix build with qt 6.4

pkgs/development/libraries/zint/default.nix

@@ -21,6 +21,8 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-ozhXy7ftmGz1XvmF8AS1ifWJ3Q5hLSsysB8qLUP60n8=";
   };
 
+  patches = [ ./qobject.patch ];
+
   outputs = [ "out" "dev" ];
 
   nativeBuildInputs = [ cmake wrapQtAppsHook ];

pkgs/development/libraries/zint/qobject.patch

@@ -0,0 +1,12 @@
+diff --git a/backend_qt/qzint.h b/backend_qt/qzint.h
+index d57ab6a..62fb0a4 100644
+--- a/backend_qt/qzint.h
++++ b/backend_qt/qzint.h
+@@ -19,6 +19,7 @@
+ #ifndef QZINT_H
+ #define QZINT_H
+ 
++#include <QObject>
+ #include <QColor>
+ #include <QPainter>
+ #include "zint.h"