Small addition, not sure if it is necessary

Samo Penic

2016-07-04 c37ddc02423f806716dcbe6403d9d9d03f5668eb

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Original written by Dan Kroll in FORTRAN. Code was then largely adapted and commented by Miha Fosnaric-Fosni. Rewritten into C by Samo Penic-Peni, with help of Miha's extensive explanations.