Run img element creation through jQuery to ensure attributes are sani…

…tised correctly

src/js/core.js

@@ -780,7 +780,7 @@ MagnificPopup.prototype = {
 						if(el.is('img')) {
 							el.attr('src', value);
 						} else {
-							el.replaceWith( '<img src="'+value+'" class="' + el.attr('class') + '" />' );
+							el.replaceWith( $('<img>').attr('src', value).attr('class', el.attr('class')) );
 						}
 					} else {
 						el.attr(arr[1], value);