Fix in memory leak. There were also leaks in the old code probably.

Samo Penic

2016-05-18 7010269f3bc74c764f5b4e9c72dd069ce34fb244

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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.