Positive answer to interactive question whether mountpoint ought to be created doesn't have any effect in internationalization

When the user invokes `encfs /path/to/encrypted/dir /path/to/inexistant/dir` `encfs` asks whether the mountpoint ought to be created. Answering yes has no effect when `LANG` is not set to a language which does not request an input of `y` for `yes` (e.g. `j` for german `ja` in `ja/nein`). The usage message is displayed and the command fails.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: encfs 1.7.4-2.4ubuntu3
Uname: Linux 3.18.3-031803-generic x86_64
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Jan 22 21:29:43 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2015-01-03 (19 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: encfs
SystemImageInfo:
 current build number: 0
 device name:
 channel: daily
 last update: Unknown
UpgradeStatus: No upgrade log present (probably fresh install)