Fix crash during setup when using some grain compositions with stochastic heating #107

	# GitHub action workflow that performs a source code formatting check.
	#
	# The workflow fails if one or more of the .hpp or .cpp files in the repository
	# are not properly formatted according to the rules in the .clang-format file
	# located in the root of the repository directory, using clang-format version 9.
	# In that case, the log file provides a list of improperly formatted files.
	# Source files with other extensions (including .h, .c, .hh, .cc) are NOT tested
	# to allow for differently formatted third-party code.
	#
	name: Check formatting

	# workflow event triggers
	on: pull_request

	# jobs that run
	jobs:
	# automatic formatting check
	check_formatting_job:
	# job name, displayed in the action log
	name: Check source code formatting
	# run this job on a Github-provided runner with Ubuntu 20.04
	# (and not 22.04 because we cannot install clang-format-9)
	runs-on: ubuntu-20.04
	# steps that make up this job
	steps:
	# install clang-format-9
	- name: Install
	run: sudo apt install clang-format-9
	# checkout using a recent version of the checkout action
	- name: Checkout
	uses: actions/checkout@v3
	# run clang-format-9 on all .hpp and .cpp files
	- name: Autoformat
	run: find . \( -name '.hpp' -or -name '.cpp' \) -exec clang-format-9 -style=file -i {} \;
	# fail the workflow if anything changed to the repository
	- name: Verify
	run: git diff --stat --no-ext-diff --exit-code

Provide feedback