Fix wrong deref

Author: tesuji

src/libstd/sys_common/wtf8.rs

@@ -600,15 +600,15 @@ impl Wtf8 {
     #[inline]
     fn final_lead_surrogate(&self) -> Option<u16> {
         match self.bytes {
-            [.., 0xED, b2 @ 0xA0..=0xAF, b3] => Some(decode_surrogate(*b2, *b3)),
+            [.., 0xED, b2 @ 0xA0..=0xAF, b3] => Some(decode_surrogate(b2, b3)),
             _ => None,
         }
     }
 
     #[inline]
     fn initial_trail_surrogate(&self) -> Option<u16> {
         match self.bytes {
-            [0xED, b2 @ 0xB0..=0xBF, b3, ..] => Some(decode_surrogate(*b2, *b3)),
+            [0xED, b2 @ 0xB0..=0xBF, b3, ..] => Some(decode_surrogate(b2, b3)),
             _ => None,
         }
     }