Youker Assistant crashes when showing HDD information

[林博仁(Buo-ren, Lin)]

As title.

## Locale ##
LANG=zh_TW.UTF-8
LANGUAGE=zh_TW:zh_HK:zh_CN:en_US:en
LC_CTYPE="zh_TW.UTF-8"
LC_NUMERIC=zh_TW.UTF-8
LC_TIME=zh_TW.UTF-8
LC_COLLATE="zh_TW.UTF-8"
LC_MONETARY=zh_TW.UTF-8
LC_MESSAGES="zh_TW.UTF-8"
LC_PAPER=zh_TW.UTF-8
LC_NAME=zh_TW.UTF-8
LC_ADDRESS=zh_TW.UTF-8
LC_TELEPHONE=zh_TW.UTF-8
LC_MEASUREMENT=zh_TW.UTF-8
LC_IDENTIFICATION=zh_TW.UTF-8
LC_ALL=

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: youker-assistant 2.0.7-0ubuntu1
Uname: Linux 4.4.0-pf8-buo-ren-pf-intel-haswell-and-gcc-autodetect-optimized x86_64
ApportVersion: 2.20.1-0ubuntu2
Architecture: amd64
CurrentDesktop: Unity
Date: Fri Apr 15 01:57:31 2016
InstallationDate: Installed on 2016-01-07 (97 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
SourcePackage: youker-assistant
UpgradeStatus: Upgraded to xenial on 2016-04-07 (7 days ago)