Fix tests for Ruby 1.8.7
Fix tests for Ruby 1.8.7

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