fixed invalid array key php warning

distfiles/logentry.php

@@ -9,7 +9,7 @@
 
 include("functions.php");
 
-if (!$_SESSION['login'] && !$_REQUEST['partview']) {
+if (!array_key_exists("login",$_SESSION) && !array_key_exists("partview",$_REQUEST)) {
     header("Location: login.php");
 }
 
@@ -500,7 +500,7 @@ if ($delete) {
     format_message(0, "<strong>Note deleted.</strong> <a href=\"lognotes.php\">Return to main page.</a>");
 }
 
-if ($_SESSION['login']) {
+if (array_key_exists('login',$_SESSION)) {
     // show the template selection line
     templateselect($techid, NULL);
 }