gpupad: fix with gcc15 (#476608)

pkgs/by-name/gp/gpupad/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchFromGitHub,
+  fetchpatch,
   cmake,
 
   glslang,
@@ -29,6 +30,12 @@ stdenv.mkDerivation (finalAttrs: {
   patches = [
     # the current version of glslang no longer separates its libs into sublibs
     ./glslang-use-combined-lib.patch
+
+    (fetchpatch {
+      name = "add-missing-inline.patch";
+      url = "https://github.com/houmain/gpupad/commit/52fcb3619e5e2698a8c11a97668670a5cd0531a8.patch";
+      hash = "sha256-FnC5uKickZVPVr+y1Thvtk+Xi38V0AHBYGU+x64EXrA=";
+    })
   ];
 
   strictDeps = true;