Fix crash when displaying vehicle overlay during route calculation #1404

	name: OTRP build Ubuntu

	on:
	push:
	tags:
	- v*
	pull_request:
	types: [opened, synchronize, reopened]

	jobs:
	build:

	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v4

	- name: install_dependencies
	run: \|
	sudo apt-get -y update
	sudo apt-get -ym install libsdl2-dev
	sudo apt-get -ym install libfreetype6-dev
	sudo apt-get -ym install libminiupnpc-dev
	sudo apt-get -ym install libbz2-dev
	sudo apt-get -ym install pkg-config
	sudo apt-get -ym install autoconf

	- name: install zstd 1.4.4
	run: \|
	cd $HOME
	wget https://github.com/facebook/zstd/releases/download/v1.4.4/zstd-1.4.4.tar.gz
	tar -zxvf zstd-1.4.4.tar.gz
	cd zstd-1.4.4
	make -j
	sudo make install
	cd $GITHUB_WORKSPACE

	- name: setup
	run: \|
	autoconf
	./configure
	echo "FLAGS = -DREVISION=$(svn info --show-item revision svn://servers.simutrans.org/simutrans) " >>config.default
	echo "STATIC = 1" >>config.default
	cat config.default >>/dev/stderr

	- name: make
	run: \|
	make -j

	- name: Set suffix for file naming
	run: \|
	if [[ $GITHUB_REF == refs/tags/* ]]; then
	echo "SUFFIX=${GITHUB_REF#refs/tags/}" >> $GITHUB_ENV
	else
	echo "SUFFIX=" >> $GITHUB_ENV
	fi

	- name: Rename executable
	run: \|
	if [ -n "${{ env.SUFFIX }}" ]; then
	mv sim sim-linux-OTRP${{ env.SUFFIX }}
	else
	mv sim sim-linux-OTRP
	fi

	- name: Upload the executable
	uses: actions/upload-artifact@v4
	with:
	name: sim-linux-OTRP${{ env.SUFFIX }}
	path: ./sim-linux-OTRP${{ env.SUFFIX }}

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