Fix FFI guide

emberian · emberian · commit 01d2efaffe42 · 2014-08-21T12:58:42.000-04:00
diff --git a/src/doc/guide-ffi.md b/src/doc/guide-ffi.md
@@ -263,6 +263,7 @@ Rust code:
 
 ~~~~no_run
 
+#[repr(C)]
 struct RustObject {
     a: i32,
     // other members
