From Tobias Schlueter:
fix for TMatrixDSym::TMatrixDSym(const TMatrixDSym&, EMatrixCreatorsOp2,
const TMatrixDSym&) doesn't size new matrix. Fixes #98605.


git-svn-id: https://root.cern.ch/svn/root/trunk@48472 27541ba8-7e3a-0410-8455-c3a389f83636