[gtk/wip/nirbheek/gtk-3-24-meson: 31/34] gtk: Fix compiler warning about deprecated declaration

[Nirbheek Chauhan <nirbheekc src gnome org>]

commit af393832359cf1c185b4576d9f30ea67be84c080
Author: Nirbheek Chauhan <nirbheek centricular com>
Date:   Sat Dec 1 03:01:58 2018 +0530

    gtk: Fix compiler warning about deprecated declaration

 gtk/gtkpixelcache.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkpixelcache.c b/gtk/gtkpixelcache.c
index 07695336c1..ffed591ca5 100644
--- a/gtk/gtkpixelcache.c
+++ b/gtk/gtkpixelcache.c
@@ -58,7 +58,7 @@ struct _GtkPixelCache {
 };
 
 GtkPixelCache *
-_gtk_pixel_cache_new ()
+_gtk_pixel_cache_new (void)
 {
   GtkPixelCache *cache;