Fix a null dereference. #305

	name: MSVC-CI
	on:
	push:
	branches: [master]
	pull_request:

	jobs:
	build:
	runs-on: windows-latest
	steps:
	- uses: actions/checkout@v2
	- name: Configure and Build
	run: \|
	mkdir build
	cd build
	cmake -G "Visual Studio 17 2022" -A Win32 ..
	cmake --build . --config Debug
	cmake --build . --config Release

	# This should probably be fixed to work from MSVC without needing to
	# use a bash shell and the GNU userland tools... But for now, the
	# GH Actions environment provides what we need.
	- name: Test
	run: \|
	cd build\Debug
	bash.exe ..\..\tests\all_tests.sh
	env:
	PYTHON_EXE: python.exe
	JOBS: 4

	- name: Upload artifact
	uses: actions/upload-artifact@v3
	with:
	name: pycdc-release
	path: build\Release\*.exe

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