Fixes checkinit build failure caused by quasiquotes pull request

The failure was caused by recent refactoring that moved fields that are
expected by reflection Reifier from early init block to the body of the
class. According to checkinit this may cause initialization issues
although they do not really happen in real life as most of these fields
aren't used during quasiquotes' reification.
Merge pull request #2722 from densh/topic/qq-checkinit

Fixes checkinit build failure caused by quasiquotes pull request