In TDataMember's constructor do not use GetListOfDataMembers.

This is necessary as that list may be in the process of being created/built when the TDataMember object
is created (and actually this is the most likely scenario).
Revert "partial revert of f221e1d until recursion CreateListOfDataMembers/TDataMember::TDataMember is resolved"

This reverts commit 13d93a2673e43565e2008be13a43367b3085a85c.
Fix issue reported on the forum (http://root.cern.ch/phpBB3/viewtopic.php?f=3&t=19041)

Usually, TGObjects are equal if they have the same window identifier. But when the TGObjects have not been created by the Window manager (e.g. a TGLVEntry), then we have to use the default TObject equal comparison
Attempt to fix for CINT.
Add a new function TMultiDimFit::GetCoefficientsRMS (from Y.Fisyak)