monero-cli: fix build issue with GCC14

[gador]

fix build with GCC14 update

fixes #367857

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

---

Add a 👍 reaction to pull requests you find important.

[gador]

nixpkgs-review result

Generated using nixpkgs-review.

Command: nixpkgs-review pr 367932

---

x86_64-linux

❌ 2 packages failed to build:

• haven-cli
• haven-cli.source

✅ 4 packages built:

• atomic-swap
• monero-cli
• monero-cli.source
• monero-gui

---

aarch64-darwin

❌ 2 packages failed to build:

• haven-cli
• haven-cli.source

[gador]

haven-cli fails on master, too

[rnhmjoj]

I did the usual test: connect monero-gui to a remote node. Looks good.