[gedit] Added missing languagemanager include

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 7488592e6315f101757b0b1f0a3387a2739946ea
Author: Jesse van den Kieboom <jesse vandenkieboom epfl ch>
Date:   Wed Aug 15 09:13:22 2012 +0200

    Added missing languagemanager include

 gedit/gedit-document.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gedit/gedit-document.c b/gedit/gedit-document.c
index 853ee58..5e41a4f 100644
--- a/gedit/gedit-document.c
+++ b/gedit/gedit-document.c
@@ -39,6 +39,7 @@
 
 #include <glib/gi18n.h>
 #include <gtksourceview/gtksourcestyleschememanager.h>
+#include <gtksourceview/gtksourcelanguagemanager.h>
 
 #include "gedit-settings.h"
 #include "gedit-document.h"