Fix kdtree to adapt the new nanoflann #291

	name: CMake

	on:
	push:
	branches: [develop]
	pull_request:
	branches: [develop]

	env:
	# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
	BUILD_TYPE: Debug

	jobs:
	build_clang:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Submodule Update
	run: git submodule update --init --recursive

	- name: Setup GLFW
	run: sudo apt install libgl-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev

	- name: Install Clang
	uses: egor-tensin/setup-clang@v1

	- name: Configure CMake Clang
	env:
	CC: clang
	CXX: clang++
	run: cmake -B ${{github.workspace}}/build_clang -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}

	- name: Build Clang
	env:
	CC: clang
	CXX: clang++
	run: cmake --build ${{github.workspace}}/build_clang --config ${{env.BUILD_TYPE}} -j 2

	- name: Test Clang
	working-directory: ${{github.workspace}}/build_clang
	run: ctest -C ${{env.BUILD_TYPE}}

	build_gcc:
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v2

	- name: Submodule Update
	run: git submodule update --init --recursive

	- name: Setup GLFW
	run: sudo apt install libgl-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev

	- name: Configure CMake GCC
	env:
	CC: gcc
	CXX: g++
	run: cmake -B ${{github.workspace}}/build_gcc -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}

	- name: Build GCC
	env:
	CC: gcc
	CXX: g++
	# Build your program with the given configuration
	run: cmake --build ${{github.workspace}}/build_gcc --config ${{env.BUILD_TYPE}} -j 2

	- name: Test GCC
	working-directory: ${{github.workspace}}/build_gcc
	run: ctest -C ${{env.BUILD_TYPE}}

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