Fix incorrectly parsed value of gid with horizontal flip flag on #125

	name: Build and Test

	on:
	workflow_dispatch:
	push:
	branches:
	- master
	pull_request:

	jobs:
	build:
	name: Build
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v3
	- name: Create build dir
	run: mkdir build
	- name: Configure CMake
	run: cmake .. -DCMAKE_BUILD_TYPE=Debug -DCMAKE_INSTALL_PREFIX=${HOME}/.local -DCMAKE_C_FLAGS='-Wall -Wextra -pedantic'
	working-directory: ./build
	- name: Build and Install
	run: make -j2 && make install
	working-directory: ./build
	- name: Build and Run dumper
	run: \|
	cmake -DCMAKE_PREFIX_PATH=${HOME}/.local &&
	make \|\| ( echo 'Build failed' && exit 1 )
	cd ../data
	../dumper/dumper b64zlib.tmx &&
	../dumper/dumper --use-rc-mgr --fd tileset.tsx --callback pointtemplate.tx --buffer tiletemplate.tx objecttemplates.tmx
	working-directory: ./examples/dumper
	- name: Test C++ compatibility
	run: \|
	cat > test.cpp <<EOF
	#include <tmx.h>
	int main(void) { tmx_map* map = tmx_load("map.tmx"); return 0; }
	EOF
	c++ -I src/ -c test.cpp

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