message: PWGGA/GammaConf: Fix in iterator over second leg
  Copy/Paste error in iteration over second leg: Instead
  of calling operator ++ and != on the iterator over the
  second leg it was done on the first leg, leading to
  undefined behaviour.
diff: @@ -384,7 +384,7 @@ std::vector<AliAODConversionMother> AliAnalysisTaskK0toPi0Pi0::MakeK0ShortCandid
  } else {
  // Same methods for Pi0 identification (both same or both mixed)
  for(auto primpi0 = primaryLeg->begin(); primpi0 != primaryLeg->end(); ++primpi0) {
  - for(auto secpi0 = primpi0 + 1; primpi0 != primaryLeg->end(); ++primpi0) {
  + for(auto secpi0 = primpi0 + 1; secpi0 != primaryLeg->end(); ++secpi0) {
  AliAODConversionMother candidate(&(*primpi0), &(*secpi0));
  if(!cuts.MesonIsSelected(&candidate, kTRUE, 0)) continue;
  candidates.push_back(candidate);
  