Bugfix infinite timeout

This fixes a rather critical bug with the current master. 
If the device is not shutdown correctly then it will get caught in an infinite timeout on the next run. This is because the timeout value for the new 1473/k4w led function was set to infinite. 

This PR sets the timeout to 100ms and also resets the audio device before using it. The latter being the main fix for the issue. 
Signed-off-by: Theodore Watson <theo@openframeworks.cc> (ofTheo)

Related: 
https://github.com/openframeworks/openFrameworks/issues/2968