src: nix stdin _readableState.reading manipulation
src: nix stdin _readableState.reading manipulation

this opts for stream.push('') which has the same effect
but uses a public API.

PR-URL: https://github.com/nodejs/io.js/pull/454
Reviewed-By: Fedor Indutny <2e687df1861dff46b1954016c7b2cad32e8742d4@gmail.com>

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node