message: Include vector and using std::vector
diff: // renamed from AliJetBkg to AliFastJetBkg as this class uses only FASTJET based algos
  //---------------------------------------------------------------------
  #include "fastjet/PseudoJet.hh"
  +#include <vector>
  +using std::vector;
  #ifdef __CINT__
  namespace fastjet {
  class PsuedoJet;
  