xneur: fix build with gcc10

pkgs/applications/misc/xneur/default.nix

···
-{ lib, stdenv, fetchurl, pkg-config, intltool, xorg, pcre, gst_all_1, glib
+{ lib, stdenv, fetchurl, fetchpatch, pkg-config, intltool, xorg, pcre, gst_all_1, glib
 , xosd, libnotify, enchant, wrapGAppsHook, gdk-pixbuf }:
 
 stdenv.mkDerivation {
···
     xosd xorg.libXext xorg.libXi libnotify
     enchant gdk-pixbuf
     gst_all_1.gst-plugins-base gst_all_1.gst-plugins-good
+  ];
+
+  patches = [
+    (fetchpatch {
+      name = "gcc-10.patch";
+      url = "https://salsa.debian.org/debian/xneur/-/raw/da38ad9c8e1bf4e349f5ed4ad909f810fdea44c9/debian/patches/gcc-10.patch";
+      sha256 = "0pc17a4sdrnrc4z7gz28889b9ywqsm5mzm6m41h67j2f5zh9k3fy";
+    })
   ];
 
   postPatch = ''