mid-call: Rename ussd-grace to mid-call
diff --git a/openbsc/src/bsc/osmo_bsc_grace.c b/openbsc/src/bsc/osmo_bsc_grace.c
index 89f05f4..882ae60 100644
--- a/openbsc/src/bsc/osmo_bsc_grace.c
+++ b/openbsc/src/bsc/osmo_bsc_grace.c
@@ -69,7 +69,7 @@
 	struct gsm_bts *bts;
 	struct gsm_bts_trx *trx;
 
-	if (!network->msc_data->ussd_grace_txt)
+	if (!network->msc_data->mid_call_txt)
 		return 0;
 
 	llist_for_each_entry(bts, &network->bts_list, list) {
@@ -78,7 +78,7 @@
 				struct gsm_bts_trx_ts *ts = &trx->ts[ts_nr];
 				for (lchan_nr = 0; lchan_nr < TS_MAX_LCHAN; ++lchan_nr) {
 					handle_sub(&ts->lchan[lchan_nr],
-						   network->msc_data->ussd_grace_txt);
+						   network->msc_data->mid_call_txt);
 				}
 			}
 		}