[ci skip][fix GH-1140] Patch by @jutaz
* io.c: ditto.
* iseq.c: ditto.
* numeric.c: ditto.
* process.c: ditto.
* string.c: ditto.
* vm_trace.c: ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53105 b2dd03c8-39d4-4d8f-98ff-823fe69b080e