message: PWGGA/GammaConv: Fix operator!=
  operator!= was implemented as operator==, leading
  to a crash in case no photon was reconstructed, and
  to a misbehaving otherwise.
diff: @@ -1825,8 +1825,8 @@ AliV0ReaderV1::iterator &AliV0ReaderV1::iterator::operator=(const AliV0ReaderV1:
  }
  bool AliV0ReaderV1::iterator::operator!=(AliV0ReaderV1::iterator &other) const{
  - if(fkData != other.fkData) return false;
  - return fCurrentIndex == other.fCurrentIndex;
  + if(fkData != other.fkData) return true;
  + return fCurrentIndex != other.fCurrentIndex;
  }
  AliV0ReaderV1::iterator AliV0ReaderV1::iterator::operator++(int index){
  