privoxy --fuzz gif animated.gif

fk@r500 ~/git/privoxy $file animated.gif
animated.gif: GIF image data, version 89a, 30 x 45

fk@r500 ~/git/privoxy $./privoxy --fuzz gif animated.gif
2015-01-30 11:35:13.742 801c06400 Gif-Deanimate: Success! GIF shrunk from 716 bytes to 174.

fk@r500 ~/git/privoxy $./privoxy --stfu --fuzz gif animated.gif
fk@r500 ~/git/privoxy $echo $?
0
fk@r500 ~/git/privoxy $./privoxy --stfu --fuzz gif /dev/zero
fk@r500 ~/git/privoxy $echo $?
1