Changed use of is*Cached() to a straight up file_exists call.
Changed use of is*Cached() to a straight up file_exists call.

The is*Cached() checks more than if the file exists, and those checks may return false when all we need to know is if the file exists or not.

lencioni/SLIR,camargoanderso/SLIR,rezozero/slir,lencioni/SLIR,rezozero/slir,camargoanderso/SLIR