[gnome-documents] preview: Fix possible warnings exiting fullscreen

[Bastien Nocera <hadess src gnome org>]

commit cd6d7c76ddf063fe0f285044c06ced0ce45e97d7
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Dec 9 14:35:10 2015 +0100

    preview: Fix possible warnings exiting fullscreen
    
    After opening a document, turning on the fullscreen mode, and starting a
    search (type a few letters), you'll get warnings from EvView when "Esc"
    is pressed.
    
    This is caused by the search being reset when exiting the preview. As we
    don't have a document, or document model anymore, there's no search to
    be done.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=759248

 src/preview.js |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/preview.js b/src/preview.js
index 6ce6ce6..ddac1e3 100644
--- a/src/preview.js
+++ b/src/preview.js
@@ -568,6 +568,10 @@ const PreviewView = new Lang.Class({
             this._updateNightMode();
 
             this.set_visible_child_full('view', Gtk.StackTransitionType.NONE);
+        } else {
+            if (!this._jobFind.is_finished())
+                this._jobFind.cancel();
+            this._jobFind = null;
         }
     },