volatile_memory: Fix usize/u64 confusion in doc test

VolatileMemory::size() now returns a u64, fix the doctest so it
compares the returned value with a u64.

BUG=none
TEST=cargo test --all -- --test-threads=1

Change-Id: If1ae94d83bfc1f2f995fd71bfdede324c162ab4e
Signed-off-by: Dylan Reid <dgreid@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/902777
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Sonny Rao <sonnyrao@chromium.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/data_model/src/volatile_memory.rs b/data_model/src/volatile_memory.rs
index 2a52d57..98528bc 100644
--- a/data_model/src/volatile_memory.rs
+++ b/data_model/src/volatile_memory.rs
@@ -394,7 +394,7 @@ impl<'a, T: DataInit> VolatileRef<'a, T> {
     /// # use std::mem::size_of;
     /// # use data_model::VolatileRef;
     ///   let v_ref = unsafe { VolatileRef::new(0 as *mut u32) };
-    ///   assert_eq!(v_ref.size(), size_of::<u32>());
+    ///   assert_eq!(v_ref.size(), size_of::<u32>() as u64);
     /// ```
     pub fn size(&self) -> u64 {
         size_of::<T>() as u64