Fix segfault if running without image.
Fix segfault if running without image.

Bug: 17325091

(cherry picked from commit 7adb7ac3913364de8cc57b8934024dd12e1d3bea)

Change-Id: I343099543ce0abf02219da84d61d9ce2dfc47980

treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst,treadstoneproject/artinst