adding null check for currentDocument to prevent error

Signed-off-by: Ananya Sen <Ananya.Sen@motorola.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/js/controllers/styles-controller.js b/js/controllers/styles-controller.js
index 0e1df1e9..e95c6614 100755
--- a/js/controllers/styles-controller.js
+++ b/js/controllers/styles-controller.js
@@ -131,7 +131,7 @@ var stylesController = exports.StylesController = Montage.create(Component, {
     handleChange: {
         value: function(notification) {
             if(notification.currentPropertyPath === "model.currentViewIdentifier") {
-                if(this.currentDocument.model.currentView.identifier === "design") {
+                if(this.currentDocument && this.currentDocument.model.currentView.identifier === "design") {
                     ///// Stage stylesheet should always be found
                     this._stageStylesheet  = this.getSheetFromElement(this.CONST.STAGE_SHEET_ID);
                     // Returns null if sheet not found (as in non-ninja projects)