fixed safari responsive image bug

Author: marcj

build/js/app.js

@@ -230,7 +230,7 @@
             for (var i in element.children) {
                 if(!element.children.hasOwnProperty(i)) continue;
 
-                if (element.children[i].tagName.toLowerCase() === 'img') {
+                if (element.children[i].tagName && element.children[i].tagName.toLowerCase() === 'img') {
                     children.push(element.children[i]);
 
                     var minWidth = element.children[i].getAttribute('min-width') || element.children[i].getAttribute('data-min-width');
@@ -835,7 +835,7 @@ function example5(){
         box[0].innerHTML = (++changed) + ' changes. ' + box.parent()[0].clientWidth+'px/'+box.parent()[0].clientHeight+'px';
     });
 }
-}).call(this,require("g5I+bs"),typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer,arguments[3],arguments[4],arguments[5],arguments[6],"/fake_6685b273.js","/")
+}).call(this,require("g5I+bs"),typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {},require("buffer").Buffer,arguments[3],arguments[4],arguments[5],arguments[6],"/fake_ef7dd2a2.js","/")
 },{"./css-element-queries/src/ElementQueries":1,"./css-element-queries/src/ResizeSensor":2,"buffer":5,"codemirror/lib/codemirror":6,"codemirror/mode/css/css":7,"codemirror/mode/htmlmixed/htmlmixed":8,"codemirror/mode/javascript/javascript":9,"codemirror/mode/xml/xml":10,"g5I+bs":14,"hammerjs/hammer":11,"jQuery":13}],4:[function(require,module,exports){
 (function (process,global,Buffer,__argument0,__argument1,__argument2,__argument3,__filename,__dirname){
 var lookup = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';