* kernel: Make sf9 return TSTATE_FREE for invalid slots: 0, >255, free. * menu: Ignore free slots even if other fields of proc_info look valid. Documentation (sysfuncs.txt) clearly states all the other info as invalid when slot_state is TSTATE_FREE. * taskbar: Same as menu. * cmm/lib/*: Same as menu. * programs/macros.inc: Add TSTATE_* macros.