Bug #9475: ID 0 is a valid MIME ID

diff --git a/imp/view.php b/imp/view.php
index a66c2c4..6016f7e 100644 (file)
--- a/imp/view.php
+++ b/imp/view.php
@@ -217,7 +217,7 @@ case 'print_attach':
     switch ($vars->pmode) {
     case 'content':
     case 'headers':
-        if (!$vars->id) {
+        if (!isset($vars->id)) {
             exit;
         }