examples/camera_light: free resources if we fail to allocate all and leave
examples/camera_light: free resources if we fail to allocate all and leave

We return here leaving maybe some other allocations around and leaking.

CID: 1327348, 1327349, 1327350

tasn/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,tasn/elementary,tasn/elementary,rvandegrift/elementary,rvandegrift/elementary,rvandegrift/elementary