Import revision 48905 from the v5-34-00 patch branch:
Protect against library loading induced by GetInterpreterTypeName (This fixes https://savannah.cern.ch/bugs/?100795)


git-svn-id: https://root.cern.ch/svn/root/branches/dev/root6-pch@48906 27541ba8-7e3a-0410-8455-c3a389f83636