[ruby-cvs:67432] ko1:r60251 (trunk): do not need to clear by NULL because of last commit

[ko1 at ruby-lang.org]

ko1	2017-10-21 19:23:59 +0900 (Sat, 21 Oct 2017)

  New Revision: 60251

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60251

  Log:
    do not need to clear by NULL because of last commit

  Modified files:
    trunk/gc.c