message: Adapt to new encode_sections() signature
diff: @@ -276,15 +276,15 @@ impl Api for ExternalApi {
  signatures: &[Vec<u8>],
  public_keys: &[Vec<u8>],
  ) -> Result<bool, VerificationError> {
  - let msgs_encoded = encode_sections(messages)?;
  + let msgs_encoded = encode_sections(messages);
  let msgs_send = build_region(&msgs_encoded);
  let msgs_send_ptr = &*msgs_send as *const Region as u32;
  - let sigs_encoded = encode_sections(signatures)?;
  + let sigs_encoded = encode_sections(signatures);
  let sig_sends = build_region(&sigs_encoded);
  let sigs_send_ptr = &*sig_sends as *const Region as u32;
  - let pubkeys_encoded = encode_sections(public_keys)?;
  + let pubkeys_encoded = encode_sections(public_keys);
  let pubkeys_send = build_region(&pubkeys_encoded);
  let pubkeys_send_ptr = &*pubkeys_send as *const Region as u32;
  