Implement the following return status from TH1::Fit:    The function return the status of the fit in the following form      fitResult = migradResult + 10*minosResult + 100*hesseResult + 1000*improveResult    The fitResult is 0 is the fit is OK.    The fitResult is negative in case of an error not connected with the fit.
Implement the following return status from TH1::Fit:
   The function return the status of the fit in the following form
     fitResult = migradResult + 10*minosResult + 100*hesseResult + 1000*improveResult
   The fitResult is 0 is the fit is OK.
   The fitResult is negative in case of an error not connected with the fit.


git-svn-id: ecbadac9c76e8cf640a0bca86f6bd796c98521e3@18607 27541ba8-7e3a-0410-8455-c3a389f83636

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