twitter:image is not writter by yost when the featured image is not fifu

Hi,

FIFU and social tags works great for images that are specified by URL.

However if the image is a classic media library image the head tags <twitter:image> is missing.

I believe this patch fixes the problem.

Index: wp-content/plugins/featured-image-from-url/includes/thumbnail.php
===================================================================
--- wp-content/plugins/featured-image-from-url/includes/thumbnail.php   (revision 21129)
+++ wp-content/plugins/featured-image-from-url/includes/thumbnail.php   (working copy)
@@ -40,7 +40,9 @@
     ]);
 }
 
-function fifu_add_social_tag_yoast() {
+function fifu_add_social_tag_yoast($img) {
+    if ($img)
+      return $img;
     return fifu_main_image_url(get_the_ID());
 }
 

Thanks