Invalid initialization of To: header (#1772893).

Thanks Tomas.

ChangeLog

@@ -232,6 +232,7 @@ Version 1.5.2 - SVN
   - Fix off-by-one in bodystructure parsing triggered by servers sending
     a body location part (e.g. Sun Java System Messaging Server). Thanks
     John Callahan (#1808382).
+  - Invalid initialization of To: header (#1772893).
 
 Version 1.5.1 (branched on 2006-02-12)
 --------------------------------------

class/mime/Rfc822Header.class.php

@@ -958,6 +958,7 @@ class Rfc822Header {
             }
         } else {
             if (!is_array($this->cc)) $this->cc = array();
+            if (!is_array($this->to)) $this->to = array();
             $srch_addr = $this->parseAddress($address);
             $results = array();
             foreach ($this->to as $to) {