[RVec] Fix namespace related compilation issues on windows
[RVec] Fix namespace related compilation issues on windows

olifre/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,root-mirror/root,karies/root,karies/root,olifre/root,karies/root,root-mirror/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,root-mirror/root,olifre/root,olifre/root,karies/root,karies/root,karies/root,karies/root,karies/root,olifre/root,karies/root,olifre/root,olifre/root,karies/root,olifre/root