🔊 log to stderr if the config TOML has an error

crates/ptth_server_gui/src/main.rs

@@ -47,7 +47,14 @@ fn main ()
 	let app = app::App::default();
 	let mut wind = Window::new (100, 100, 500, 180, "PTTH server");
 	
-	let config_file_opt = ptth_server::load_toml::load::<ConfigFile, _> ("./config/ptth_server.toml").ok ();
+	let config_file_opt = match ptth_server::load_toml::load::<ConfigFile, _> ("./config/ptth_server.toml") 
+	{
+		Ok (x) => Some (x),
+		Err (e) => {
+			eprintln! ("Error in config TOML: {:?}", e);
+			None
+		}
+	};
 	
 	let (hit_tx, mut hit_rx) = mpsc::channel (1);
 	{