[Overview] Fix zoom when dragging items from the dash

Commit 4632db177 removed a required include statement, re-add it to
fix DND from the dash.

diff --git a/js/ui/overview.js b/js/ui/overview.js
index 5187ca5477fb6360fbf33f311609c1d7d315b996..abf595352c59b417218edf9ee310823bf7359eb3 100644 (file)
--- a/js/ui/overview.js
+++ b/js/ui/overview.js
@@ -8,6 +8,7 @@ const St = imports.gi.St;
 const Gettext = imports.gettext.domain('gnome-shell');
 const _ = Gettext.gettext;
 
+const GenericDisplay = imports.ui.genericDisplay;
 const Lightbox = imports.ui.lightbox;
 const Main = imports.ui.main;
 const Panel = imports.ui.panel;