Fix for Ruby 1.8.* compatibility.
Fix for Ruby 1.8.* compatibility.

jarib/ffi-icu,fantasticfears/ffi-icu,marek-veber/ffi-icu,cfis/ffi-icu,pressrelations/ffi-icu,jarib/ffi-icu,marek-veber/ffi-icu,pressrelations/ffi-icu,cfis/ffi-icu,fantasticfears/ffi-icu