end call button

[kaskin2-6.0]

So my screen broke at the top left corner. The cracks don't extend into the screen so it doesn't really bother me. The issue is that the crack in over the light sensor (the one that turns off the screen when you put it to your face). Anytime I dial a number the phone thinks it is up to my face and I am unable to do anything. Including hanging up. Is there a way to set one of the physical buttons to end a call?