fix: only emit must_use hint when wdf function has return type #8

	on:
	push:
	pull_request:
	merge_group:
	schedule: # Trigger a job on default branch at 4AM PST everyday
	- cron: "0 11 * * *"

	name: Local Development Makefile

	env:
	RUSTFLAGS: -D warnings

	jobs:
	build:
	name: Test WDR's local cargo-make Makefile
	runs-on: windows-latest
	strategy:
	matrix:
	wdk:
	- Microsoft.WindowsWDK.10.0.22621 # NI WDK

	target_triple:
	- x86_64-pc-windows-msvc
	- aarch64-pc-windows-msvc

	steps:
	- name: Checkout Repository
	uses: actions/checkout@v4

	- name: Install Winget
	uses: ./.github/actions/winget-install
	with:
	GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

	- name: Install WDK (${{ matrix.wdk }})
	run: \|
	if (!(winget list --exact --source winget --id ${{ matrix.wdk }})[-1].contains("${{ matrix.wdk }}")) {
	winget install --disable-interactivity --source winget --exact --id ${{ matrix.wdk }}
	}

	- name: Install Rust Toolchain (${{ matrix.target_triple }})
	uses: dtolnay/rust-toolchain@stable # Use stable since local makefile pins toolchain versions anyways
	with:
	targets: ${{ matrix.target_triple }}

	- name: Install Cargo Make
	uses: taiki-e/install-action@v2
	with:
	tool: cargo-make

	- name: Test wdk-pre-commit-flow cargo-make task
	run: cargo make wdk-pre-commit-flow

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