corrected typo

the list following the changed line lists 5 options, not 4
fixed crash

i had a crash when asl_get(msg, ASL_KEY_MSG) returns NULL
this simple change seems to fix it
Merge pull request #1 from CalQL8ed-K-OS/patch-1

fixed crash
Merge pull request #363 from CalQL8ed-K-OS/master

fixed crash and corrected typo