Add nullptr-check to prevent segfault. #165

	name: Windows build

	on:
	pull_request:

	# Cancel previous runs if a more recent commit is pushed.
	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref }}
	cancel-in-progress: true

	permissions: read-all

	jobs:
	windows-build:
	name: Build and run tests on Windows using CMake
	runs-on: windows-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3
	with:
	fetch-depth: '0'
	- name: Clone submodules
	run: git submodule update --init --recursive
	- name: Build
	run: \|
	mkdir build
	cd build
	cmake -DSPIRV_REFLECT_BUILD_TESTS=ON ..

	cmake --build . --config Release -- /nologo /verbosity:minimal /maxcpucount

Provide feedback