tweaks to link for image subsearch 6, a=chris

diff --git a/src/views/helpers/ImagesHelper.php b/src/views/helpers/ImagesHelper.php
index 816ef6926..6d7cd3573 100644
--- a/src/views/helpers/ImagesHelper.php
+++ b/src/views/helpers/ImagesHelper.php
@@ -54,7 +54,7 @@ class ImagesHelper extends Helper implements CrawlConstants
     public function render($image_pages, $query, $subsearch,
         $image_subsearch = true)
     {
-        if ($subsearch != 'images') {
+        if ($subsearch != 'images' && !stristr($query, "media%3Aimage")) {
             if ($image_subsearch) {
                 $query .= '&s=images';
             } else {