[gnome-screenshot] Fix compile-time warning

[Bastien Nocera <hadess src gnome org>]

commit c494f441c7ac22c8e921b24aef6468bf20ec6c57
Author: Bastien Nocera <hadess hadess net>
Date:   Thu Jun 28 11:34:23 2012 +0100

    Fix compile-time warning
    
    screenshot-filename-builder.c:295:1: warning: no previous prototype for 'screenshot_build_filename_async' [-Wmissing-prototypes]
    screenshot-filename-builder.c:322:1: warning: no previous prototype for 'screenshot_build_filename_finish' [-Wmissing-prototypes]
    
    https://bugzilla.gnome.org/show_bug.cgi?id=679057

 src/screenshot-filename-builder.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/screenshot-filename-builder.c b/src/screenshot-filename-builder.c
index e6c6174..94143f9 100644
--- a/src/screenshot-filename-builder.c
+++ b/src/screenshot-filename-builder.c
@@ -24,6 +24,8 @@
 #include <pwd.h>
 #include <string.h>
 
+#include "screenshot-filename-builder.h"
+
 typedef enum
 {
   TEST_SAVED_DIR = 0,