build warning/error in module_mac.mm

[timblechmann]

module_mac.mm is supposed to be added to the host's source code, but it does not build with -Werror:

/Users/tim/build/qt6-dev/_deps/vst3sdk-src/public.sdk/source/vst/hosting/module_mac.mm:373:77: error: unused parameter 'errorDescription' [-Werror,-Wunused-parameter]
  373 | bool Module::validateBundleStructure (const std::string& path, std::string& errorDescription)
      |                                                                             ^
1 error generated.

should be trivial to flag the parameter as [[maybe_unused]]

[ygrabit]

thanks, will be fixed next update