gprs_ns2_sns: SNS-SIZE contains the actual number of local endpoints

The SNS-SIZE sent from BSS to SGSN contains the actual number of local
IP endpoints on the BSS side, and not the maximum number of remote IP
endpoints supported.

Change-Id: I62a8bca4a3f7c47bcb9f292b045fa867d8877a09
diff --git a/src/gb/gprs_ns2_sns.c b/src/gb/gprs_ns2_sns.c
index b5b6677..ec48eda 100644
--- a/src/gb/gprs_ns2_sns.c
+++ b/src/gb/gprs_ns2_sns.c
@@ -896,9 +896,9 @@
 
 
 	if (gss->num_max_ip4_remote > 0)
-		ns2_tx_sns_size(gss->sns_nsvc, true, gss->num_max_nsvcs, gss->num_max_ip4_remote, -1);
+		ns2_tx_sns_size(gss->sns_nsvc, true, gss->num_max_nsvcs, gss->num_ip4_local, -1);
 	else
-		ns2_tx_sns_size(gss->sns_nsvc, true, gss->num_max_nsvcs, -1, gss->num_max_ip6_remote);
+		ns2_tx_sns_size(gss->sns_nsvc, true, gss->num_max_nsvcs, -1, gss->num_ip6_local);
 }
 
 static void ns2_sns_st_bss_config_bss(struct osmo_fsm_inst *fi, uint32_t event, void *data)