[image_view_counter] give post a view so it isn't null

ext/image_view_counter/test.php

@@ -17,6 +17,7 @@ class ImageViewCounterTest extends ShimmiePHPUnitTestCase
     public function testPopular()
     {
         $image_id = $this->post_image("tests/pbx_screenshot.jpg", "pbx computer screenshot");
+        $this->get_page("post/view/$image_id");
         $this->get_page("popular_images");
         $this->assert_text("$image_id");
     }