calendar-server: Add gnu_printf format attribute

Suggested by compiler with `-Wsuggest-attribute=format`

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/441

diff --git a/src/calendar-server/gnome-shell-calendar-server.c b/src/calendar-server/gnome-shell-calendar-server.c
index 9b76fb07318f4f0813014d5a6a0c0525f9da6ce7..2ad8fb99e930f3a24d6751cddad857165004664d 100644 (file)
--- a/src/calendar-server/gnome-shell-calendar-server.c
+++ b/src/calendar-server/gnome-shell-calendar-server.c
@@ -1078,7 +1078,7 @@ main (int    argc,
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-static void
+static void __attribute__((format(printf, 1, 0)))
 print_debug (const gchar *format, ...)
 {
   gchar *s;