f nit

Author: valentinewallace

lightning/src/util/chacha20poly1305rfc.rs

@@ -132,7 +132,7 @@ impl<'a, W: Writer> Writer for ChaChaPolyWriter<'a, W> {
 	// complete.
 	fn write_all(&mut self, src: &[u8]) -> Result<(), io::Error> {
 		let mut src_idx = 0;
-		while src.len() - src_idx > 0 {
+		while src_idx < src.len() {
 			let mut write_buffer = [0; 8192];
 			let bytes_written = (&mut write_buffer[..]).write(&src[src_idx..]).expect("In-memory writes can't fail");
 			self.chacha.encrypt_in_place(&mut write_buffer[..bytes_written]);