out_bigquery: fix log format specifier
@@ -434,7 +434,7 @@ static void cb_bigquery_flush(const void *data, size_t bytes,
struct flb_upstream_conn *u_conn;
struct flb_http_client *c;
- flb_plg_trace(ctx->ins, "flushing bytes %d", bytes);
+ flb_plg_trace(ctx->ins, "flushing bytes %zu", bytes);
/* Get upstream connection */
u_conn = flb_upstream_conn_get(ctx->u);
