message: Fix bug which prevents usage of cubic bg
diff: @@ -138,12 +138,13 @@ void AliStrangenessModule::SetSigExtTech ( TString lRecSigExtTech ) {
  if( !lRecSigExtTech.Contains("bincounting") &&
  !lRecSigExtTech.Contains("linear") &&
  !lRecSigExtTech.Contains("quadratic") &&
  + !lRecSigExtTech.Contains("cubic") &&
  !lRecSigExtTech.Contains("MC") ){
  - AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  + AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  AliWarning(Form(" Sig. ext. mode \"%s\" not recognized!",lRecSigExtTech.Data() ) );
  - AliWarning(" Accepted modes: \"bincounting\", \"linear\" or \"quadratic\"");
  + AliWarning(" Accepted modes: \"bincounting\", \"linear\", \"quadratic\" or \"cubic\"");
  AliWarning(" WARNING: Will set to linear! ");
  - AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  + AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  lRecSigExtTech = "linear";
  }
  for(Int_t ibin = 0; ibin<100; ibin++){
  @@ -158,10 +159,11 @@ void AliStrangenessModule::SetVariableSigExtTech ( Long_t lRecNPtBins, TString *
  if( !lRecSigExtTech[ibin].Contains("bincounting") &&
  !lRecSigExtTech[ibin].Contains("linear") &&
  !lRecSigExtTech[ibin].Contains("quadratic") &&
  + !lRecSigExtTech[ibin].Contains("cubic") &&
  !lRecSigExtTech[ibin].Contains("MC") ){
  AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  AliWarning(Form(" Sig. ext. mode \"%s\" not recognized!",lRecSigExtTech[ibin].Data() ) );
  - AliWarning(" Accepted modes: \"bincounting\", \"linear\" or \"quadratic\"");
  + AliWarning(" Accepted modes: \"bincounting\", \"linear\", \"quadratic\" or \"cubic\"");
  AliWarning(" WARNING: Will set to linear! ");
  AliWarning("!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!-!");
  lRecSigExtTech[ibin] = "linear";
  