Updated function pre_set_site_transient_update_plugins_filter for EDD_SL_Plugin_Updater 1.2

gistfile1.php

<?php

	/**
	 * Check for Updates at the defined API endpoint and modify the update array.
	 *
	 * This function dives into the update API just when WordPress creates its update array,
	 * then adds a custom API call and injects the custom plugin data retrieved from the API.
	 * It is reassembled from parts of the native WordPress plugin update code.
	 * See wp-includes/update.php line 121 for the original wp_update_plugins() function.
	 *
	 * @uses api_request()
	 *
	 * @param array $_transient_data Update array build by WordPress.
	 * @return array Modified update array with custom plugin data.
	 */
	function pre_set_site_transient_update_plugins_filter( $_transient_data ) {
		static $api_response = null;

		if( empty( $_transient_data ) ) {
			return $_transient_data;
		}

		if ( is_null( $api_response ) || $api_response === false || is_wp_error( $api_response ) ) {
			$to_send = array( 'slug' => $this->slug );
			$api_response = $this->api_request( 'plugin_latest_version', $to_send );
		}

		if( false !== $api_response && is_object( $api_response ) && isset( $api_response->new_version ) ) {
			if( version_compare( $this->version, $api_response->new_version, '<' ) ) {
				$_transient_data->response[$this->name] = $api_response;
			}
		}

		return $_transient_data;
	}