Remove class exists check, as it'll be true regardless

Author: roborourke

wp-permastructure.php

@@ -3,7 +3,7 @@
 Plugin Name: WP Permastructure
 Plugin URI: https://github.com/interconnectit/wp-permastructure
 Description: Adds the ability to define permalink structures for any custom post type using rewrite tags.
-Version: 1.5.0
+Version: 1.5.1
 Author: Robert O'Rourke
 Author URI: http://interconnectit.com
 License: GPLv2 or later
@@ -38,10 +38,6 @@
  * 1.0: Initial import
  */
 
-if ( class_exists( 'wp_permastructure' ) ) {
-	return;
-}
-
 add_action( 'init', array( 'wp_permastructure', 'instance' ), 0 );
 
 class wp_permastructure {