id_table.c: fix for C89 compilers
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51678 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
id_table.c: fix for C89 compilers
features. [ruby-dev:49239] [Bug #11487]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51678 b2dd03c8-39d4-4d8f-98ff-823fe69b080e