cmake

FDS Source: Fix uninitialized variable #485

Job	Run time
macos-latest gnu_openmpi openmp=ON Release	7m 27s
macos-latest gnu_openmpi openmp=ON Debug	3m 24s
macos-latest gnu_openmpi openmp=OFF Debug	3m 47s
macos-latest gnu_openmpi openmp=OFF Release	7m 25s
windows mpiifort intelmpi openmp=ON Release	6m 20s
windows mpiifx intelmpi openmp=OFF Release	5m 53s
windows mpiifx intelmpi openmp=ON Release	5m 53s
windows mpiifx intelmpi openmp=OFF Debug	3m 3s
windows mpiifx intelmpi openmp=ON Debug	3m 9s
windows mpiifort intelmpi openmp=ON Debug	3m 22s
windows mpiifort intelmpi openmp=OFF Release	5m 51s
windows mpiifort intelmpi openmp=OFF Debug	3m 21s
${{ matrix.container }} ${{ matrix.compiler_mpi }} openmp=${{ matrix.openmp }} ${{ matrix.build_type }}	0s
	58m 55s

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