message: Use non-0 test data
diff: @@ -271,7 +271,7 @@ mod test {
  ];
  for size in sizes.into_iter() {
  let region_ptr = instance.allocate(size).expect("error allocating");
  - let original = vec![0u8; size];
  + let original = vec![170u8; size];
  instance
  .write_memory(region_ptr, &original)
  .expect("error writing");
  @@ -291,7 +291,7 @@ mod test {
  // Allocate sets length to 0. Write some data to increase length.
  let region_ptr = instance.allocate(length).expect("error allocating");
  - let data = vec![0u8; length];
  + let data = vec![170u8; length];
  instance
  .write_memory(region_ptr, &data)
  .expect("error writing");
  