Small but vital uppdate to BdstMrsAna.cxx

From: Mads Mikelsen (mads.mikelsen@fys.uio.no)
Date: Sun Mar 02 2003 - 15:33:37 EST

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    Hello

I have dicovered an error in the code that fills global information
for the MRS in BDST. To be more precise in the program

BdstMrsAna.cxx

On line 700 in the old bdst the global ntuple; nGlobal, is wrongfully
filled:

l700: nGlobal->Fill(trigger, bbMethod, cent);

I have removed this line and updated cvs.

The global ntuple had allready been filled correctly earlier
in the function "Loop()":

l645:nGlobal->Fill(trigger,bbMethod,vtx,cent);

The global information should only be filled once. The way bdst worked
before this uppdate centrality information was filled on top of
the vertex information, giving a very strange vertex distribution to say
the least.

I discovered this error after trying to do event-normalisation for
different vertexbins in my yields analasys, and getting some very strange
restults. I tracked the problem back to bdst.

NOTE. Since i have only been working with the MRS i have only checked this
for the MRS analysis. I have not seen if a similar mistake is made in the
FS analysis.

Best regards from Mads

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