Correct error in QENS_Fixed_JumpsNsitesLogNormDist model
Reported by Aleksandra Pajzderska on May 28th 2019. Setting P3 = 0 (which should be the msd in the DW factor) makes S(Q,w) = 0!
Reported by Aleksandra Pajzderska on May 28th 2019. Setting P3 = 0 (which should be the msd in the DW factor) makes S(Q,w) = 0!