* gc.c (init_mark_stack): MEMZERO() receive type as 2nd argument instead
  of size.
  Coverity Scan found this bug.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47483 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-09-10

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47484 b2dd03c8-39d4-4d8f-98ff-823fe69b080e