From Eddy:

1) TVectorT TMatrixT TMatrixTSym TMatrixTSparse : made sure that
IsValid Assert's
    are only done when gMatrixCheck is kTRUE
2) TMatrixTSym::Similarity and SimilarityT create a temporary matrix .
If storage
     is <= kWorkMax use a local array . This way less temporary
elements are
    created .
3) In  TMatrixTSym::Similarity and SimilarityT some shape checking was
missing


git-svn-id: http://root.cern.ch/svn/root/trunk@14460 27541ba8-7e3a-0410-8455-c3a389f83636