fix for order of classes

wpdr-change-tracker.php

@@ -12,11 +12,12 @@
 class wpdr_track_meta_changes {
 
 	public $document_change_list = array();
-
+	public $wpdr;
+
 	function __construct() {
 
-		//makes all WPDR functions accessible as $this->wpdr->{function}
-		$this->wpdr = &Document_Revisions::$instance;
+		//set up class	
+		add_action( 'plugins_loaded', array( &$this, 'setup_wpdr' ) );
 
 		//taxs
 		add_action( 'set_object_terms', array( &$this, 'build_taxonomy_change_list' ), 10, 6 );
@@ -31,6 +32,13 @@ function __construct() {
 		add_action( 'save_post', array( &$this, 'append_changes_to_revision_summary' ), 20, 1 );
 
 	}
+	/**
+	 * Makes all WPDR functions accessible as $this->wpdr->{function}	
+	 * Call here so that Doc Revs is loaded
+	 */
+	function setup_wpdr() {
+		$this->wpdr = &Document_Revisions::$instance;
+	}
 
 	/**
 	 * Compares post title to previous revisions post title and adds to internal array if changed