- implement in the Profile the existing option G to get the bin error in the...

- implement in the Profile the existing option G to get the bin error in the case of combination of measurements y 
    with gaussian error dy. In this case the profile must be filled 
  with a weight = 1./dy**2 and the correct error from the combination (1./sqrt(Sum(1./dy**2) ) ) will be obtained. 
   This option was requested by Yuri Fisyak.


git-svn-id: http://root.cern.ch/svn/root/trunk@24431 27541ba8-7e3a-0410-8455-c3a389f83636