message: Change memory parameter to u32
diff: pub use crate::backing::{ImportBacking, LocalBacking};
  use crate::{
  module::ModuleInner,
  + structures::TypedIndex,
  types::{LocalMemoryIndex, LocalOrImport, MemoryIndex},
  };
  use std::{ffi::c_void, mem, ptr, slice};
  @@ -88,8 +89,9 @@ impl Ctx {
  }
  }
  - pub fn memory<'a>(&'a mut self, mem_index: MemoryIndex) -> &'a mut [u8] {
  + pub fn memory<'a>(&'a mut self, mem_index: u32) -> &'a mut [u8] {
  let module = unsafe { &*self.module };
  + let mem_index = MemoryIndex::new(mem_index as usize);
  match mem_index.local_or_import(module) {
  LocalOrImport::Local(local_mem_index) => {
  let local_backing = unsafe { &mut *self.local_backing };
  