Deal with new ffi Ruby version requirement (#1115)
Deal with new ffi Ruby version requirement (#1115)

CI was failing for 1.9.2 and 1.9.3. This is due to
https://github.com/ffi/ffi/pull/683

Related:
- https://github.com/ffi/ffi/issues/699
rspec/rspec-expectations,rspec/rspec-expectations