Incorrect Buffer constructor behavior in v0.11.6

[RReverser]

It was always possible to create Buffer from any array-like object using http://nodejs.org/docs/v0.11.6/api/buffer.html#buffer_new_buffer_array and much code expects that behavior. In general, this technique still works, but not for new Buffer(anotherBufferInstance, ...args...) call - such call corrupts data in both original and resulting buffers.
Of course, I can workaround it in my code by checking instance of source data and using slice method specially for Buffer, but that looks like a serious bug that can cause data corruption in other projects as well.

[bnoordhuis]

Thanks for the bug report, fixed in bc28acd.

[RReverser]

Thanks!