update post count on purge

public/src/client/topic/events.js

@@ -120,6 +120,7 @@ define('forum/topic/events', ['forum/topic/browsing', 'forum/topic/postTools', '
 	function onPostPurged(pid) {
 		$('#post-container li[data-pid="' + pid + '"]').fadeOut(500, function() {
 			$(this).remove();
+			postTools.updatePostCount();
 		});
 	}
 
@@ -141,8 +142,6 @@ define('forum/topic/events', ['forum/topic/browsing', 'forum/topic/postTools', '
 				postEl.find('.post-content').html(data.content);
 			}
 		}
-
-		postTools.updatePostCount();
 	}
 
 	function togglePostFavourite(data) {