use fulcrm_apiv2_client_id(); fixup problem with payload_error_msg

fulcrm_webhook.module

@@ -152,9 +152,11 @@ function fulcrm_webhook_webhook( $uuid ) {
             $payload = json_decode( file_get_contents( "php://input" ), $assoc = TRUE );
             $payload_error = json_last_error();
             $payload_error_msg = json_last_error_msg();
+        } else {
+            $payload_error_msg = 'no payload';
         }
 
-        $client_id = variable_get( 'fulcrm_apiv2_client_id' );
+        $client_id = fulcrm_apiv2_client_id();
 
         if ( fulcrm_apiv2_prevent_loop( $headers ) ) {
             $op = null;