Fix for non existent directories

Notes

• For this release, if you have favorites from previous versions, remove them and start again. You can just empty your existing favorites file or replace the whole SimpleMenu directory with the contents of the zip file for this release.
• See the wiki page for controls
• If you want to replace gmenu, and you are on CFW 1.3.1, just put autoexec.sh (attached below) in the main partition and be sure to extract the simplemenu zip file to /mnt/apps/simplemenu

What's new

• if a roms directory doesn't exist, the program doesn't crash.