Don't hit `__mock_proxy` unless you need to. This avoids a Rubby 1.8.7 Proc equality bug: https://gist.github.com/1702877
Don't hit `__mock_proxy` unless you need to. This avoids a Rubby 1.8.7 Proc equality bug: https://gist.github.com/1702877

This commit fixes the build for 1.8.7
edwardpark/rspec-mocks,rspec/rspec-mocks,ducthanh/rspec-mocks,rwz/rspec-mocks,zephyr-dev/rspec-mocks,zephyr-dev/rspec-mocks,telekomatrix/rspec-mocks,AEgan/rspec-mocks,edwardpark/rspec-mocks,samphippen/rspec-mocks,maclover7/rspec-mocks,thoughtbot/rspec-mocks,h4ck3rm1k3/rspec-mocks,telekomatrix/rspec-mocks,h4ck3rm1k3/rspec-mocks,thoughtbot/rspec-mocks,rspec/rspec-mocks,samphippen/rspec-mocks,rwz/rspec-mocks,maclover7/rspec-mocks,AEgan/rspec-mocks,ducthanh/rspec-mocks