Listen parameter has no effect on program

Listen does nothing, at the moment, the code just changes 0 to 1 if set.
In order to prevent confusion, it's better to remove it.

Also clean up to extra whitespaces
Loops does not do anything in this program

It's actually done by the `-t` (pulse parameter). Removed.
Merge pull request #1 from wari/patch-1

Listen parameter has no effect on program