12
You did miss something, I could've posted it clearer:
<{if $xoops_isuser}>
<{php}>
GLOBAL $xoopsUser;
$pm_handler =& xoops_gethandler('privmessage');
$uid = $xoopsUser->getVar('uid');
$criteria = new CriteriaCompo(new Criteria('read_msg', 0));
$criteria->add(new Criteria('to_userid', $uid));
$msgcount = $pm_handler->getCount($criteria);
$GLOBALS['xoopsTpl']->assign('msgcount', $msgcount);
<{/php}>
<{/if}>
Put the same if $xoops_isuser around the pm inbox code.