fix bug when loading different roms

snes-core/src/rom/lo_rom.rs

@@ -20,6 +20,7 @@ impl LoROM {
 
 impl ROM for LoROM {
     fn load(&mut self, filename: &str) -> std::io::Result<bool> {
+        self.data = vec![];
         load_rom(filename, &mut self.data)
     }
 

snes-frontend/src/emu_ui/menu.rs

@@ -10,6 +10,7 @@ pub fn build_menu_bar(emulator: &mut Emulator, ui: &mut egui::Ui, state: &mut Ap
             if ui.button("Load ROM file").clicked() {
                 if let Some(path) = rfd::FileDialog::new().pick_file() {
                     let picked_path = path.display().to_string();
+                    // TODO: replace this load function by an external function as each ROM may not always be LoROM
                     match emulator.bus.rom.load(&picked_path) {
                         Ok(_) => {
                             emulator.hard_reset();