[gnome-builder/file-monitor] document: add missing declaration

[Christian Hergert <chergert src gnome org>]

commit 96716c518dc775806f5a99018abd4d009a3160f9
Author: Christian Hergert <christian hergert me>
Date:   Thu Dec 11 18:32:51 2014 -0800

    document: add missing declaration

 src/editor/gb-editor-document.h |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/editor/gb-editor-document.h b/src/editor/gb-editor-document.h
index fff8155..af3d7d8 100644
--- a/src/editor/gb-editor-document.h
+++ b/src/editor/gb-editor-document.h
@@ -84,6 +84,7 @@ gboolean               gb_editor_document_save_finish                  (GbEditor
                                                                         GAsyncResult           *result,
                                                                         GError                **error);
 void                   gb_editor_document_reformat                     (GbEditorDocument       *document);
+void                   gb_editor_document_check_externally_modified    (GbEditorDocument       *document);
 
 G_END_DECLS