better error dropping

src/lib.rs

@@ -31,6 +31,9 @@ fn jspg_failure() -> JsonB {
     message: "JSPG extension has not been initialized via jspg_setup".to_string(),
     details: crate::drop::ErrorDetails {
       path: "".to_string(),
+      cause: None,
+      context: None,
+      schema: None,
     },
   };
   let drop = crate::drop::Drop::with_errors(vec![error]);