Fixed endless image loading errors when broken image could not be loa…

…ded (almende#4245)

lib/network/Images.js

@@ -35,7 +35,7 @@ class Images {
         }
 
         //Clear the old subscription to the error event and put a new in place that only handle errors in loading the brokenImageUrl
-        imageToLoadBrokenUrlOn.onerror = () => {
+        imageToLoadBrokenUrlOn.image.onerror = () => {
             console.error("Could not load brokenImage:", brokenUrl);
             // cache item will contain empty image, this should be OK for default
         };