Fix typo in export-image
Fix typo in export-image

Fixes #132
WLANThermo/pi-gen,jacen92/pi-gen,rkubes/pi-gen,timcoote/Pumpkin-gen,timcoote/Pumpkin-gen,BlokasLabs/modep,BlokasLabs/modep,timcoote/Pumpkin-gen,KingBrewer/pi-gen,RPi-Distro/pi-gen