fix uninitialized use of offset #194

	# continuous integration
	name: ci

	on:
	push:
	branches: [ "main" ]
	pull_request:
	workflow_dispatch:

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	# check out the repo
	- uses: actions/checkout@v3
	with:
	submodules: true

	# install clang-format
	- name: install clang-format
	run: \|
	sudo apt update
	sudo apt install clang-format
	clang-format --version

	# lint using clang-format
	- name: clang-format lint
	run: \|
	./tools/third-party/run-clang-format/run-clang-format.py -r src include test

	test:
	runs-on: ubuntu-latest
	steps:
	# check out the repo
	- uses: actions/checkout@v3

	# install tools
	- name: install tools
	run: \|
	sudo apt-get update -y && sudo apt-get install -y cmake

	# update submodules
	- name: update submodules
	run: git submodule update --init --recursive

	# make build dir
	- name: prepare build
	run: mkdir build

	# build and install libgd
	- name: install libgd
	run: \|
	cd third-party/libgd
	mkdir build
	cd build
	cmake -DBUILD_TEST=1 ..
	cmake --build .
	make install DESTDIR=../../../build/libgd

	# build
	- name: build tests
	run: \|
	cd build
	cmake -DDEBUG=true ..
	cmake --build .

	# test
	- name: run tests
	run: ./tools/run-tests.sh

Provide feedback