Function dbuf_error

deps/quickjs/cutils.h:495–497

static inline int JS_PRINTF_FORMAT_ATTR(2, 3) dbuf_printf(DynBuf *s, JS_PRINTF_FORMAT const char *fmt, ...);
static inline void dbuf_free(DynBuf *s);
static inline bool dbuf_error(DynBuf *s) {
    return s->error;
}
static inline void dbuf_set_error(DynBuf *s)
{
    s->error = true;