PHP 8.2 compatibility: Fixed more "Creation of dynamic property is

deprecated" errors

fp-includes/core/core.bplustree.class.php

@@ -1562,6 +1562,9 @@ class BPlusTree {
 	var $fifo_enabled = false;
 	
 	var $file = null;
+	var $nodesize = null;
+	var $keylen = null;
+	var $position = null;
 
 	/**
 	 * constructor

fp-includes/core/core.plugins.php

@@ -6,6 +6,7 @@ class plugin_indexer extends fs_filelister {
 	var $_varname = 'fp_plugins';
 
 	var $_enabledlist = null;
+	var $enabledlist = null;
 	
 	var $_directory = PLUGINS_DIR;