numeric.c: for strict ANSI
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
numeric.c: for strict ANSI
[ruby-core:55312] [Bug #8495]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@41835 b2dd03c8-39d4-4d8f-98ff-823fe69b080e