Function is_invalid_handle

crates/vm/src/stdlib/_io.rs:6023–6025

(handle: HANDLE)

    }

    fn is_invalid_handle(handle: HANDLE) -> bool {
        handle == INVALID_HANDLE_VALUE || handle.is_null()
    }

    /// Check if a HANDLE is a console and what type ('r', 'w', or '\0').
    fn get_console_type(handle: HANDLE) -> char {