Avoid exception on /play page: photoSelector not found

Currently theres an exception on the [`/play` page](http://hub.revisit.link/5c7fe2af-c064-4744-a66c-fca868280f13/play):

![image](https://cloud.githubusercontent.com/assets/39191/4038094/a65117a8-2cae-11e4-85fc-4fcbe111965b.png)

I don't like exceptions and I bet you don't either so I wrapped this call in a conditional embrace. 

hope u like it.