coreos/etcd — pull request #1099 by unihorn (2014-09-17 21:42:01+00:00)
Title: wal: OpenFromIndex fails if it cannot find previous index

Example:
We save entry 1, 2, 3 to WAL.
If we try to open 100, it should fail.

It sets `enti` correctly when Create or OpenAtIndex. So cut on am empty file is fine now.

#1033 point 2.