minor fix in plugin manager

darcs-hash:20060724193727-9b6ab-e1e9368fc18d674bd027bbfd03245e7b52944e67.gz

lib/plugins/plugin/admin.php

@@ -669,7 +669,7 @@ class ap_manage {
           if (!$dh = @opendir($src)) return false;
 
           if ($ok = ap_mkdir($dst)) {
-            while ($ok && $f = readdir($dh)) {
+            while ($ok && (false !== ($f = readdir($dh))) {
               if ($f == '..' || $f == '.') continue;
               $ok = ap_copy("$src/$f", "$dst/$f");
             }