make topic icon image width/height available to viewforum and search templates (Bug #15934)

git-svn-id: file:///svn/phpbb/branches/phpBB-3_0_0@8857 89ea8834-ac86-4346-8a33-228a782c2dd0

phpBB/includes/session.php

@@ -2097,6 +2097,7 @@ class user extends session
 
 	/**
 	* Specify/Get image
+	* $suffix is no longer used - we know it. ;) It is there for backward compatibility.
 	*/
 	function img($img, $alt = '', $width = false, $suffix = '', $type = 'full_tag')
 	{