Comment 8 for bug 1375555

Description of problem:
Crashes on startup in current F21.

Version-Release number of selected component:
calibre-1.46.0-1.fc21

Additional info:
reporter: libreport-2.2.3
cmdline: python2 /usr/bin/calibre --detach
executable: /usr/bin/calibre
kernel: 3.16.0-0.rc6.git2.2.fc22.x86_64
runlevel: N 5
type: Python
uid: 1001

Truncated backtrace:
#1 <module> in /usr/lib64/calibre/calibre/utils/magick/__init__.py:14
#2 <module> in /usr/lib64/calibre/calibre/db/backend.py:31
#3 <module> in /usr/lib64/calibre/calibre/db/legacy.py:17
#4 <module> in /usr/lib64/calibre/calibre/gui2/ui.py:26
#5 run_gui in /usr/lib64/calibre/calibre/gui2/main.py:320
#6 main in /usr/lib64/calibre/calibre/gui2/main.py:458
#7 <module> in /usr/bin/calibre:20