Bug fix: stellar balck-bodies #379

Job	Run time
build+test (linux, gfortran, openmp=yes, release=yes)	14m 18s
build+test (linux, gfortran, openmp=yes, release=no)	13m 22s
build+test (linux, gfortran, openmp=no, release=yes)	32m 36s
build+test (linux, gfortran, openmp=no, release=no)	30m 37s
build+test (linux, ifort, openmp=yes, release=yes)	21m 44s
build+test (linux, ifort, openmp=yes, release=no)	20m 16s
build+test (linux, ifort, openmp=no, release=yes)	35m 37s
build+test (linux, ifort, openmp=no, release=no)	41m 48s
build+test (macos, gfortran, openmp=yes, release=yes)	15m 52s
build+test (macos, gfortran, openmp=yes, release=no)	20m 38s
build+test (macos, gfortran, openmp=no, release=yes)	46m 52s
build+test (macos, gfortran, openmp=no, release=no)	46m 33s
build+test (macos, ifort, openmp=yes, release=yes)	23m 59s
build+test (macos, ifort, openmp=yes, release=no)	16m 49s
build+test (macos, ifort, openmp=no, release=yes)	39m 4s
build+test (macos, ifort, openmp=no, release=no)	35m 43s
benchmark (gfortran)	3m 11s
release	0s
benchmark (ifort)	3m 33s
	7h 42m 32s

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