LoKiCore Kinematics.h/.cpp: fixes to `deltaM2` (@ibelyaev) (!1628) · Merge requests · LHCb / LHCb · GitLab

Marco Cattaneo requested to merge cherry-pick-ea0742c7 into master Nov 17, 2018

minor fix in deltaM2 function (better treatment of low-momenta)
add the variant of deltaM2 function with the forced assignment of the same massLoKiCore Kinematics.h/.cpp

Cherry picked from !1627 (merged) on run2-patches