suppress warning
suppress warning

* spec/rubyspec/optional/capi/ext/fixnum_spec.c: suppress
  unused-but-set-variable warning.

git-svn-id: ab86ecd26fe50a6a239cacb71380e346f71cee7d@58712 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

eregon/rubyspec,sgarciac/spec,ruby/rubyspec,nobu/rubyspec,ruby/spec,ruby/spec,sgarciac/spec,ruby/rubyspec,nobu/rubyspec,nobu/rubyspec,sgarciac/spec,ruby/spec,eregon/rubyspec,eregon/rubyspec