fix divu when theta=0 or pi #1589

	name: detonation-sdc

	on: [pull_request]

	concurrency:
	group: ${{ github.ref }}-${{ github.head_ref }}-${{ github.workflow }}
	cancel-in-progress: true

	jobs:
	detonation-sdc:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- name: Get submodules
	run: \|
	git submodule update --init
	cd external/Microphysics
	git fetch; git checkout development
	cd ../amrex
	git fetch; git checkout development
	cd ../..

	- name: Install dependencies
	run: \|
	sudo apt-get update -y -qq
	sudo apt-get -qq -y install curl g++>=9.3.0

	- name: Compile Detonation
	run: \|
	cd Exec/science/Detonation
	make DIM=1 USE_MPI=FALSE -j 4 USE_SIMPLIFIED_SDC=TRUE

	- name: Run Detonation
	run: \|
	cd Exec/science/Detonation
	./Castro1d.gnu.SMPLSDC.ex inputs-det-x.nse max_step=40 castro.time_integration_method=3

	- name: Build the fextrema tool
	run: \|
	cd external/amrex/Tools/Plotfile
	make programs=fextrema -j 4

	- name: Check the extrema
	run: \|
	cd Exec/science/Detonation
	../../../external/amrex/Tools/Plotfile/fextrema.gnu.ex det_x_plt00040 > fextrema.out
	diff fextrema.out ci-benchmarks/sdc_det_plt00040_extrema.out

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