This fixes
https://code.google.com/p/singularity-viewer/issues/detail?id=714
The problem was a typo in AIStateMachine::sleep, >= should have been <=
which caused a state machine that uses yield_ms() to never run anymore
when next run it already should have run again. AIFilePicker is the only
state machine that currently uses yield_ms and I hadn't spotted this
because I don't have plugin messages on by default which made my viewer
just that much faster that it the yield never expired the first run
already (causing it to expire immediately).
The rest of the changes in this commit are just minor improvements /
conformation to the EXAMPLE_CODE in aistatemachine.cpp.
779f697ffb