Ticket #11805: 11805.2.patch

wp-admin/includes/media.php

@@ -422 +422 @@
 
                 $post = apply_filters('attachment_fields_to_save', $post, $attachment);
 
-                if ( isset($attachment['image_alt']) && !empty($attachment['image_alt']) ) {
+                if ( isset($attachment['image_alt']) ) {
                         $image_alt = get_post_meta($attachment_id, '_wp_attachment_image_alt', true);
                         if ( $image_alt != stripslashes($attachment['image_alt']) ) {
                                 $image_alt = wp_strip_all_tags( stripslashes($attachment['image_alt']), true );