DEBUG_SHM_MPIwindow

GASDYN parameter for FPM2

Default: DEBUG_SHM_MPIwindow = 1 Debugging shred memory, especially the creation of an MPI-window. DEBUG_SHM_MPIwindow == 1 :: classically create the MPI-window such that the head shared process created all memory, and the worker processes create 0 memory. DEBUG_SHM_MPIwindow == 2 :: each shared process creates an equal partition of memory inside of the window.
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DEBUG_SHM_MPIwindow GASDYN parameter for FPM2