send_osc: Add Workaround For Sending Null Char
send_osc: Add Workaround For Sending Null Char

When a null character is passed to send_osc via
send_osc PORT /path ,c $'\x00'
then an empty string was passed to the _add method.

Reinterpreting an empty string as "\0" within send_osc.py eliminates
a possible crash in this case.

dsacre/pyliblo