Add missing errno.h include #165

	name: CI

	# Controls when the action will run. Triggers the workflow on push or pull request
	# events but only for the master branch
	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	runs-on: ${{ matrix.os }}
	strategy:
	matrix:
	os: [ubuntu-20.04, ubuntu-22.04]

	steps:
	- name: Checkout
	uses: actions/checkout@v2
	with:
	submodules: 'recursive'
	fetch-depth: 0 # submodule checkout does not work with depth=1 (the default)

	- name: Install dependencies
	run: \|
	sudo apt update
	sudo apt install -y qtbase5-dev qtdeclarative5-dev

	- name: Build firebird-headless
	working-directory: headless
	run: make -j8

	- name: Build firebird
	run: \|
	mkdir build
	cd build
	qmake ..
	make -j4

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