message: Fix up merge, use new union
diff: @@ -385,7 +385,7 @@ impl Function {
  Self {
  store: store.clone(),
  definition: FunctionDefinition::Host(HostFunctionDefinition {
  - has_env: !wasmer_export.vmctx.is_null(),
  + has_env: !unsafe { wasmer_export.vmctx.host_env.is_null() },
  }),
  exported: wasmer_export,
  }
  