Make TTreeRow methods reentrant
Make TTreeRow methods reentrant

When TTreeRow::SetRow called, release previous buffer if any.
Contrary in TTreeRow::Close() prevent destroy of already deleted buffer
olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root,olifre/root,karies/root,olifre/root,karies/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,olifre/root,olifre/root,karies/root,root-mirror/root,karies/root