More cleanup

src/lib.rs

@@ -570,12 +570,12 @@ impl InnerConnection {
             AuthenticationMD5Password { salt } => {
                 let pass = try!(user.password.ok_or(ConnectError::MissingPassword));
                 let mut hasher = Md5::new();
-                let _ = hasher.input(pass.as_bytes());
-                let _ = hasher.input(user.user.as_bytes());
+                hasher.input(pass.as_bytes());
+                hasher.input(user.user.as_bytes());
                 let output = hasher.result_str();
                 hasher.reset();
-                let _ = hasher.input(output.as_bytes());
-                let _ = hasher.input(&salt);
+                hasher.input(output.as_bytes());
+                hasher.input(&salt);
                 let output = format!("md5{}", hasher.result_str());
                 try!(self.write_messages(&[PasswordMessage { password: &output }]));
             }

src/priv_io.rs

@@ -170,7 +170,7 @@ pub fn initialize_stream(params: &ConnectParams,
     try!(socket.write_message(&SslRequest { code: message::SSL_CODE }));
     try!(socket.flush());
 
-    if try!(socket.read_u8()) == 'N' as u8 {
+    if try!(socket.read_u8()) == b'N' {
         if ssl_required {
             return Err(ConnectError::NoSslSupport);
         } else {

src/types/slice.rs

@@ -62,7 +62,7 @@ impl<'a, T: 'a + ToSql> ToSql for Slice<'a, T> {
 
     fn accepts(ty: &Type) -> bool {
         match ty.kind() {
-            &Kind::Array(ref member) => <T as ToSql>::accepts(member),
+            &Kind::Array(ref member) => T::accepts(member),
             _ => false,
         }
     }