netrigctld.c: Add missing Set Split param--N2ADR

From the SourceForge tracker:

I am using version hamlib-1.2.15.2~rc3.  Start rigctl and specify rig 2
(rigctld). The command "s" (get_split_vfo) will return two parameters,
the spilt state (0 or 1) and the TX VFO name. The command "S"
(set_split_vfo) will send one parameter, the TX VFO name, but will not
send the split state (0 or 1).  This is incorrect. In the file
dummy/netrigctl.c change netrigctl_set_split_vfo() line 782:

len = sprintf(cmd, "S %s\n", rig_strvfo(tx_vfo));

to include the "split" paramater; perhaps:

len = sprintf(cmd, "S %d %s\n", split, rig_strvfo(tx_vfo));

Thanks to Jim, N2ADR for reporting this.

dummy/netrigctl.c

@@ -779,7 +779,7 @@ static int netrigctl_set_split_vfo(RIG *rig, vfo_t vfo, split_t split, vfo_t tx_
 
   rig_debug(RIG_DEBUG_VERBOSE,"%s called\n", __FUNCTION__);
 
-  len = sprintf(cmd, "S %s\n", rig_strvfo(tx_vfo));
+  len = sprintf(cmd, "S %d %s\n", split, rig_strvfo(tx_vfo));
 
   ret = netrigctl_transaction(rig, cmd, len, buf);
   if (ret > 0)