CorsikaFenvFallback

In the refactory-2020 branch there is now a constant warning that should be addressed and fixed:

/home/rulrich/work/corsika/corsika/corsika/detail/framework/utility/CorsikaFenvFallback.inl:13:2: warning: #warning is a GCC extension
 #warning No enabling/disabling of floating point exceptions - platform needs better implementation

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