Support clone for ThreeBytes

Author: TheBlueMatt

c-bindings-gen/src/types.rs

@@ -861,6 +861,7 @@ fn initial_clonable_types() -> HashSet<String> {
 	let mut res = HashSet::new();
 	res.insert("crate::c_types::U5".to_owned());
 	res.insert("crate::c_types::U128".to_owned());
+	res.insert("crate::c_types::ThreeBytes".to_owned());
 	res.insert("crate::c_types::FourBytes".to_owned());
 	res.insert("crate::c_types::TwelveBytes".to_owned());
 	res.insert("crate::c_types::SixteenBytes".to_owned());

lightning-c-bindings/src/c_types/mod.rs

@@ -774,6 +774,7 @@ pub struct ThirtyTwoBytes {
 	pub data: [u8; 32],
 }
 
+#[derive(Clone)]
 #[repr(C)]
 /// A 3-byte byte array.
 pub struct ThreeBytes { /** The three bytes */ pub data: [u8; 3], }