Change consensus::encode::serialize assert to debug_assert

This is just a sanity check on our own serialization code.

src/consensus/encode.rs

@@ -147,7 +147,7 @@ impl From<psbt::Error> for Error {
 pub fn serialize<T: Encodable + ?Sized>(data: &T) -> Vec<u8> {
     let mut encoder = Vec::new();
     let len = data.consensus_encode(&mut encoder).unwrap();
-    assert_eq!(len, encoder.len());
+    debug_assert_eq!(len, encoder.len());
     encoder
 }