fix warnings and grumbles

substrate/codec/src/lib.rs

@@ -20,7 +20,7 @@
 #![cfg_attr(not(feature = "std"), no_std)]
 #![cfg_attr(not(feature = "std"), feature(alloc))]
 
-#[macro_use]
+#[cfg_attr(not(feature = "std"), macro_use)]
 extern crate substrate_runtime_std as rstd;
 
 mod endiansensitive;

substrate/codec/src/slicable.rs

@@ -111,7 +111,7 @@ impl Slicable for Vec<u8> {
 }
 
 macro_rules! impl_vec_simple_array {
-	($($size:expr)*) => {
+	($($size:expr),*) => {
 		$(
 			impl<T> Slicable for Vec<[T; $size]>
 				where [T; $size]: EndianSensitive
@@ -151,7 +151,7 @@ macro_rules! impl_vec_simple_array {
 	}
 }
 
-impl_vec_simple_array!(1 2 4 8 16 32 64);
+impl_vec_simple_array!(1, 2, 4, 8, 16, 32, 64);
 
 impl<T: Slicable> NonTrivialSlicable for Vec<T> where Vec<T>: Slicable {}
 

substrate/rpc/src/chain/mod.rs

@@ -18,7 +18,6 @@
 
 use primitives::block;
 use client;
-use client::blockchain::BlockId;
 use state_machine;
 
 mod error;