address underlying reasons exceptions are thrown

[millerta]

Original issue series 5 gfortran exceptions are signalling: IEEE_DENORMAL #73
V3.33 release traps these exceptions

This issue for new release will fix exceptions by flags and or code errors.

additional checks
  valgrind --leak-check=yes --track-origins=yes  --log-file=memcheck.txt mylagrit < input.lgi
  mkdir valgrind
  cp memcheck.txt valgrind