[gtk: 12/14] profiler: Add G_GNUC_PRINTF markers to silence warnings

[Matthias Clasen <matthiasc src gnome org>]

commit d9c59a7c8ccdb7c0ffdd8c5f9104a94675e49f40
Author: Alexander Larsson <alexl redhat com>
Date:   Wed Feb 12 13:35:42 2020 +0100

    profiler: Add G_GNUC_PRINTF markers to silence warnings
    
    I was getting CI failures like:
     ../gdk/gdkprofiler.c: In function ‘add_markvf’:
    ../gdk/gdkprofiler.c:111:3: error: function ‘add_markvf’ might be a candidate for ‘gnu_printf’ format 
attribute [-Werror=suggest-attribute=format]

 gdk/gdkprofiler.c | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/gdk/gdkprofiler.c b/gdk/gdkprofiler.c
index 4d122b7b91..4617d9a7e3 100644
--- a/gdk/gdkprofiler.c
+++ b/gdk/gdkprofiler.c
@@ -100,6 +100,12 @@ gdk_profiler_add_mark (gint64      start,
                                    "gtk", name, message);
 }
 
+static void add_markvf (gint64      start,
+                        guint64     duration,
+                        const char *name,
+                        const char *format,
+                        va_list      args) G_GNUC_PRINTF(4, 0);
+
 static void
 add_markvf (gint64      start,
             guint64     duration,