bsc: Do not print "SI 18" but SI2ter when the SI generation fails
diff --git a/openbsc/src/libbsc/bsc_init.c b/openbsc/src/libbsc/bsc_init.c
index a19179d..2533aa7 100644
--- a/openbsc/src/libbsc/bsc_init.c
+++ b/openbsc/src/libbsc/bsc_init.c
@@ -209,9 +209,9 @@
 
 	return 0;
 err_out:
-	LOGP(DRR, LOGL_ERROR, "Cannot generate SI %u for BTS %u, most likely "
+	LOGP(DRR, LOGL_ERROR, "Cannot generate SI%s for BTS %u, most likely "
 		"a problem with neighbor cell list generation\n",
-		i, bts->nr);
+		get_value_string(osmo_sitype_strs, i), bts->nr);
 	return rc;
 }