fix undefined variable
fix undefined variable

Undefined variable `price` is causing our bid screen to fail to progress. Two questions, since I'm not very up to date on Force:

- Can we use linting to catch these?
- This code runs on an event handler, but since the event mechanism is synchronous, it crashes the whole turn of the event loop, interrupting the process it's responding to. Is there a better pattern we could use to avoid this? (e.g. a variant of `on` that uses `setTimeout` or a variant of `trigger` that swallows exceptions?)
eessex/force,xtina-starr/force,xtina-starr/force,dblock/force,yuki24/force,anandaroop/force,cavvia/force-1,mzikherman/force,cavvia/force-1,kanaabe/force,anandaroop/force,artsy/force-public,yuki24/force,joeyAghion/force,damassi/force,xtina-starr/force,joeyAghion/force,cavvia/force-1,eessex/force,artsy/force,kanaabe/force,oxaudo/force,joeyAghion/force,artsy/force,damassi/force,dblock/force,izakp/force,xtina-starr/force,erikdstock/force,joeyAghion/force,oxaudo/force,dblock/force,yuki24/force,artsy/force-public,erikdstock/force,kanaabe/force,damassi/force,mzikherman/force,kanaabe/force,izakp/force,mzikherman/force,artsy/force,cavvia/force-1,erikdstock/force,anandaroop/force,izakp/force,damassi/force,artsy/force,oxaudo/force,erikdstock/force,kanaabe/force,oxaudo/force,mzikherman/force,eessex/force,anandaroop/force,izakp/force,yuki24/force,eessex/force