[ruby-cvs:70905] kazu:r63814 (trunk): Fix a typo [ci skip]

[kazu at ruby-lang.org]

kazu	2018-07-01 10:38:18 +0900 (Sun, 01 Jul 2018)

  New Revision: 63814

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=63814

  Log:
    Fix a typo [ci skip]

  Modified files:
    trunk/array.c