Snippets for librecad 2.2.1.5 from Nix x86_64-linux

Sourced from https://hydra.nixos.org/log/gb7fibzwkgc887j4bhhqg6qzz60zsjrc-librecad-2.2.1.5.drv.

• circletools.cpp:270:13: warning: 'bool {anonymous}::changeCircleLayerInPlace(Plug_Entity*, const QString&, bool&)' defined but not used [-Wunused-function]
    270 | static bool changeCircleLayerInPlace(Plug_Entity* ent, const QString& targetLayer, bool& outAlreadyOnLayer) {
        |             ^~~~~~~~~~~~~~~~~~~~~~~~