Fixed pion duplication bug and replaced pion vertex check with checking if it…
From branch LHCBGAUSS-1272.DaughtersInLHCbAndCutsForDstar3pi
See merge request !228 (merged)
(cherry picked from commit c62ced01)
ed600c0d Fixed pion duplication bug and replaced pion vertex check with checking if it…
b9793f6d Used range-based for loops and STL algorithms whenever possible.
Edited by Gloria Corti