Minor changes for correctness

traits/src/identities.rs

@@ -53,7 +53,7 @@ zero_impl!(f64, 0.0f64);
 
 impl<T: Zero + PartialEq> Zero for Wrapping<T> where Wrapping<T>: Add<Output=Wrapping<T>> {
     fn is_zero(&self) -> bool {
-        self.0 == T::zero()
+        self.0.is_zero()
     }
     fn zero() -> Self {
         Wrapping(T::zero())

traits/src/lib.rs

@@ -82,7 +82,7 @@ impl<T: Num> Num for Wrapping<T>
 {
     type FromStrRadixErr = T::FromStrRadixErr;
     fn from_str_radix(str: &str, radix: u32) -> Result<Self, Self::FromStrRadixErr> {
-        T::from_str_radix(str, radix).map(|x| Wrapping(x))
+        T::from_str_radix(str, radix).map(Wrapping)
     }
 }