sms db: when storing an SMS, retrieve the ID

seemed like a good idea, but not sure if we need it at all.

Change-Id: I5fa55307a6abb8bbfe56619235d7b79fbbda6caf
diff --git a/src/libmsc/db.c b/src/libmsc/db.c
index 241bc86..a1683be 100644
--- a/src/libmsc/db.c
+++ b/src/libmsc/db.c
@@ -769,6 +769,9 @@
 		return -EIO;
 
 	dbi_result_free(result);
+
+	sms->id = dbi_conn_sequence_last(conn, "id");
+	LOGP(DLSMS, LOGL_INFO, "Stored SMS id=%llu in DB\n", sms->id);
 	return 0;
 }