Add missing include to fix compilation error in dev3
Fixes
Rec/ChargedProtoANNPID/src/ChargedProtoANNPIDCommonBase.icpp:366:17: error: 'config' has incomplete type
366 | std::ifstream config( ( paramRoot + configFile ).c_str() );
| ^~~~~~
Broken in dev3 (also with gcc 9.2.0) but not in dev4 or in LCG_97a - probably due to some change in the includes picked up from ROOT
Edited by Marco Cattaneo