sanjuuni: add patch to build with c++17

fixing build with poco 0.13

pkgs/tools/graphics/sanjuuni/default.nix

@@ -1,6 +1,7 @@
 { lib
 , stdenv
 , fetchFromGitHub
+, fetchpatch
 , pkg-config
 , ffmpeg
 , poco
@@ -19,6 +20,14 @@ stdenv.mkDerivation rec {
     sha256 = "sha256-wgtyrik4Z5AXd8MHkiMuxMpGh/xcEtNqivyhvL68aac=";
   };
 
+  patches = [
+    (fetchpatch {
+      name = "build-with-cxx17.patch";
+      url = "https://github.com/MCJack123/sanjuuni/commit/f2164bc18935bcf63ee5b0a82087bc91f7fd258d.patch";
+      hash = "sha256-ZmP+AmUV7fcIFqSA6e56Nt6u03leE9PX36g2z0nLswo=";
+    })
+  ];
+
   nativeBuildInputs = [
     pkg-config
   ];