From 4000bcbfea7a8c42fb35ba002e890ff504908a5a Mon Sep 17 00:00:00 2001
From: Robin Ward <robin.ward@gmail.com>
Date: Mon, 23 Dec 2013 18:00:04 -0500
Subject: [PATCH] FIX: Only consider image sizes from valid src values.

---
 .../discourse/views/composer/composer_view.js         | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/app/assets/javascripts/discourse/views/composer/composer_view.js b/app/assets/javascripts/discourse/views/composer/composer_view.js
index c3faff72d74..8b7a942aa91 100644
--- a/app/assets/javascripts/discourse/views/composer/composer_view.js
+++ b/app/assets/javascripts/discourse/views/composer/composer_view.js
@@ -327,11 +327,12 @@ Discourse.ComposerView = Discourse.View.extend(Ember.Evented, {
   imageSizes: function() {
     var result = {};
     $('#wmd-preview img').each(function(i, e) {
-      var $img = $(e);
-      result[$img.prop('src')] = {
-        width: $img.width(),
-        height: $img.height()
-      };
+      var $img = $(e),
+          src = $img.prop('src');
+
+      if (src && src.length) {
+        result[src] = { width: $img.width(), height: $img.height() };
+      }
     });
     return result;
   },