Fix bit masking of debug leds in set_hdd_led()

Author: jannic

src/main.rs

@@ -620,7 +620,7 @@ impl Hardware {
 	/// These are connected to the bit 4 of GPIOA on the MCP23S17.
 	fn set_hdd_led(&mut self, enabled: bool) {
 		// LEDs are active-low.
-		self.debug_leds = (self.debug_leds & 0x17) | u8::from(enabled);
+		self.debug_leds = (self.debug_leds & 0x1e) | if enabled { 0 } else { 1 };
 		self.io_chip_write(0x12, self.debug_leds << 3 | self.last_cs);
 	}