[gnome-documents] evince: fix uninitialized variable

[Cosimo Cecchi <cosimoc src gnome org>]

commit 3f67d3b7278ad7a1aafe0c45139d8bfbd10710ae
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Sat Feb 11 15:20:34 2017 -0800

    evince: fix uninitialized variable

 src/evinceview.js |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/evinceview.js b/src/evinceview.js
index 90d72e5..431ebb5 100644
--- a/src/evinceview.js
+++ b/src/evinceview.js
@@ -725,6 +725,7 @@ const EvinceViewToolbar = new Lang.Class({
     _init: function(preview) {
         this.parent(preview);
 
+        this._fsStateId = 0;
         this._handleEvent = false;
 
         this.addSearchButton('view.find');