Fix in vertexmove. Macro was not working

Samo Penic

2016-05-31 bac0042f1ec44a174741f05b218ddde48108b3f2

1
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.