Fix negative length issues. #4

	name: Continuous Integration

	on:
	push:
	pull_request:

	jobs:
	linux:
	name: Linux (.NET 6)
	runs-on: ubuntu-20.04

	steps:
	- name: Clone Repository
	uses: actions/checkout@v2

	- name: Install .NET 6
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: '6.0.x'

	- name: Prepare Environment
	run: \|
	. mod.config;
	awk '/\r$$/ { exit(1); }' mod.config \|\| (printf "Invalid mod.config format. File must be saved using unix-style (LF, not CRLF or CR) line endings.\n"; exit 1);

	- name: Check Code
	run: \|
	make check
	make check-packaging-scripts

	- name: Check Mod
	run: \|
	sudo apt-get install lua5.1
	make check-scripts
	make test

	linux-mono:
	name: Linux (mono)
	runs-on: ubuntu-20.04

	steps:
	- name: Clone Repository
	uses: actions/checkout@v2

	- name: Prepare Environment
	run: \|
	. mod.config;
	awk '/\r$$/ { exit(1); }' mod.config \|\| (printf "Invalid mod.config format. File must be saved using unix-style (LF, not CRLF or CR) line endings.\n"; exit 1);

	- name: Check Code
	run: \|
	make check
	make check-packaging-scripts

	- name: Check Mod
	run: \|
	sudo apt-get install lua5.1
	make check-scripts
	make test

	windows:
	name: Windows (.NET 6.0)
	runs-on: windows-2019

	steps:
	- name: Clone Repository
	uses: actions/checkout@v2

	- name: Install .NET 6
	uses: actions/setup-dotnet@v1
	with:
	dotnet-version: '6.0.x'

	- name: Check Code
	shell: powershell
	run: \|
	dotnet nuget locals all --clear
	.\make.ps1 check

	- name: Check Mods
	run: \|
	chocolatey install lua --version 5.1.5.52
	$ENV:Path = $ENV:Path + ";C:\Program Files (x86)\Lua\5.1\"
	.\make.ps1 check-scripts
	.\make.ps1 test

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