gsm: gsm_gsmtime2fn(): constify param
Change-Id: Ib29d5a8e7dcf50fb086f967857b0afa076573163
diff --git a/include/osmocom/gsm/gsm_utils.h b/include/osmocom/gsm/gsm_utils.h
index 8e346c7..721456d 100644
--- a/include/osmocom/gsm/gsm_utils.h
+++ b/include/osmocom/gsm/gsm_utils.h
@@ -181,7 +181,7 @@
char *gsm_fn_as_gsmtime_str(uint32_t fn);
/* Convert from GSM time to frame number */
-uint32_t gsm_gsmtime2fn(struct gsm_time *time);
+uint32_t gsm_gsmtime2fn(const struct gsm_time *time);
/* Returns static buffer with string representation of a GSM Time */
char *osmo_dump_gsmtime(const struct gsm_time *tm);