[Plugin: WP-SpamFree Anti-Spam] plugin dir hardcoded. why?

Hi Scott,

I noticed in your code (several times so why not once and make it global??)

// Pre-2.6 compatibility
	if ( !defined('WP_CONTENT_DIR') ) {
		define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
		}
	// Guess the location
	$wpsf_plugin_path = WP_CONTENT_DIR.'/plugins/'.plugin_basename(dirname(__FILE__));

Would it not be wiser to do something like

// Pre-2.6 compatibility
	if ( !defined('WP_CONTENT_DIR') )
		define( 'WP_CONTENT_DIR', ABSPATH . 'wp-content' );
	if ( ! defined( 'WP_PLUGIN_DIR' ) )
		define( 'WP_PLUGIN_DIR', WP_CONTENT_DIR . '/plugins' );
	// Know the location
	$wpsf_plugin_path = WP_PLUGIN_DIR.'/'.plugin_basename(dirname(__FILE__));

http://wordpress.org/extend/plugins/wp-spamfree/