* gc.c (gc_mark_roots): rename roots to be categories instead of function names.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43296 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2013-10-16

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43297 b2dd03c8-39d4-4d8f-98ff-823fe69b080e