Make message listing less error prone

CHANGELOG

@@ -1,8 +1,13 @@
 CHANGELOG RoundCube Webmail
 ---------------------------
 
+2007/10/17 (thomasb)
+----------
+- Make message listing less error prone
+
 2007/10/10 (thomasb)
 ----------
+- Suppress IE errors when clearing attachments form (#1484356)
 - Set preferences field in user table to NULL (#1484386)
 - Log error when login fails due to auto_create_user turned off
 - Update UPGRADING instructions

program/include/rcube_imap.inc

@@ -2040,6 +2040,10 @@ class rcube_imap
         {
         $uid = $sql_arr['uid'];
         $this->cache[$cache_key][$uid] = unserialize($sql_arr['headers']);
+        
+        // featch headers if unserialize failed
+        if (empty($this->cache[$cache_key][$uid]))
+          $this->cache[$cache_key][$uid] = iil_C_FetchHeader($this->conn, preg_replace('/.msg$/', '', $key), $uid, true);
         }
       }
       

program/steps/mail/func.inc

@@ -314,11 +314,13 @@ function rcmail_js_message_list($a_headers, $insert_top=FALSE)
   $OUTPUT->command('set_message_coltypes', $a_show_cols);
 
   // loop through message headers
-  for ($n=0; $a_headers[$n]; $n++)
+  foreach ($a_headers as $n => $header)
     {
-    $header = $a_headers[$n];
     $a_msg_cols = array();
     $a_msg_flags = array();
+    
+    if (empty($header))
+      continue;
 
     // format each col; similar as in rcmail_message_list()
     foreach ($a_show_cols as $col)