Don't crash on empty adapters

SeparatedFolderListAdapter can have empty
adapter children, in which case the position == 0
check is actually invalid. We should always just
check position < count since it emcompasses position == 0.

b/17070221

Change-Id: I480aa8ce226edff03e33d73b01e6a2fdf23e0b0d
1 file changed