f use core not std

Author: TheBlueMatt

lightning/src/util/ser.rs

@@ -245,7 +245,7 @@ pub(crate) struct VecReadWrapper<T: Readable>(pub Vec<T>);
 impl<T: Readable> Readable for VecReadWrapper<T> {
 	fn read<R: Read>(reader: &mut R) -> Result<Self, DecodeError> {
 		let count: u64 = Readable::read(reader)?;
-		let mut values = Vec::with_capacity(cmp::min(count, MAX_ALLOC_SIZE / (::std::mem::size_of::<T>() as u64)) as usize);
+		let mut values = Vec::with_capacity(cmp::min(count, MAX_ALLOC_SIZE / (core::mem::size_of::<T>() as u64)) as usize);
 		for _ in 0..count {
 			match Readable::read(reader) {
 				Ok(v) => { values.push(v); },