hotplug-sniffer: 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/hotplug-sniffer/hotplug-sniffer.c b/src/hotplug-sniffer/hotplug-sniffer.c
index c229af51fe66ec2cb27b5cbcd1a641e20a40219c..31e45795ed43f262d583d5f0d36946ee7cf34c01 100644 (file)
--- a/src/hotplug-sniffer/hotplug-sniffer.c
+++ b/src/hotplug-sniffer/hotplug-sniffer.c
@@ -266,7 +266,7 @@ main (int    argc,
 
 /* ---------------------------------------------------------------------------------------------------- */
 
-static void
+static void __attribute__((format(printf, 1, 0)))
 print_debug (const gchar *format, ...)
 {
   gchar *s;