small simplification

git-svn-id: svn+ssh://svn.in2p3.fr/class@354 0e7d625b-0364-4367-a6be-d5be4a48d228

source/branches/CLASSV3/Model/XS/XSM_MLP.cxx

@@ -259,7 +259,7 @@ TTree* XSM_MLP::CreateTMVAInputTree(IsotopicVector isotopicvector,int TimeStep)
 
 	IsotopicVector IVAccordingToUserInfoFile = isotopicvector.GetThisComposition(IVInputTMVA);
 
-	double Ntot = IVAccordingToUserInfoFile.GetTotalMass()*1e6/IVAccordingToUserInfoFile.MeanMolar()*6.02214129e23;
+	double Ntot = IVAccordingToUserInfoFile.GetSumOfAll();
 
 	IVAccordingToUserInfoFile = IVAccordingToUserInfoFile/Ntot;