rsl: Fix the audio handling after the 'alignment' handling fix
rsl: Fix the audio handling after the 'alignment' handling fix

The issue got introduced in fcdba6bfaca9e016f35fc9fa826948ec74f66121
when moving from the uint32_t pointer to a plain int. The code
was now like this:

if (connect_ip > 0) {
   if (connect_ip == 0)
       lookup_ip_based_on_rsl
...

Coverity detected this as logically dead code and it was breaking
audio handling for the osmo-bsc case. Remove the tristate handling,
the RSL behavior is that leaving out port/ip is like specifying it
as zero.

Fixes: Coverity CID 1040769

geosphere/osmo-bts,geosphere/osmo-bts,telenoobie/osmo-bts,telenoobie/osmo-bts,osmocom/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts,telenoobie/osmo-bts,geosphere/osmo-bts