Stylo.


git-svn-id: https://root.cern.ch/svn/root/trunk@48616 27541ba8-7e3a-0410-8455-c3a389f83636
Searching throuhg ROOT specials may induce an inner lookup and we have to save
the state of the Preprocessor, otherwise its token cache gets eaten up.

Fixes savannah: https://savannah.cern.ch/bugs/?99093 and puts another corner
stone for enabling the dynamic scopes soon.


git-svn-id: https://root.cern.ch/svn/root/trunk@48617 27541ba8-7e3a-0410-8455-c3a389f83636