clippy fixes (#974)

src/device/cart/rom.rs

@@ -149,7 +149,7 @@ pub fn init(device: &mut device::Device, rom_file: &[u8]) {
 }
 
 fn is_system_pal(country: u8) -> bool {
-    let pal_codes: [u8; 8] = [b'D', b'F', b'I', b'P', b'S', b'U', b'X', b'Y'];
+    let pal_codes: [u8; 8] = *b"DFIPSUXY";
     for i in pal_codes {
         if country == i {
             return true;

src/device/cpu_instructions.rs

@@ -763,7 +763,7 @@ pub fn cache(device: &mut device::Device, opcode: u32) {
             }
         }
         _ => {
-            panic!("unknown cache code {:#01x}", rt(opcode))
+            panic!("unknown cache code {:x}", rt(opcode))
         }
     }
 }

src/ui/usb.rs

@@ -18,7 +18,7 @@ fn respond_to_handshake(usb_tx: &tokio::sync::broadcast::Sender<UsbData>, data:
         ui::usb::send_to_usb(
             usb_tx,
             ui::usb::UsbData {
-                data: [b'N', b'6', b'4'].to_vec(),
+                data: b"N64".to_vec(),
                 data_type: DATATYPE_TCPTEST,
                 data_size: 3,
             },