move path RIGHT NOW. Will update the path to the current waypoint, if any. CAVEAT: this only actually updates if a queue index number passed in is sufficiently close to 0 to allow this to compute, based on an internal global assessment of how often this very expensive computation is allowed to run.</p><p><strong>Arguments:</strong><br />
The queue number this was given the last time</p><p><strong>Return value:</strong><br />
Whether the update was performed, or if it should be tried again next frame.<br />
