[msvc] Fix debug build due to nodiscard

Adds a USE(...) around a std::accumulate which appears to have nodiscard
on it in MSVC builds. Probably only manifests with debug flags on as
otherwise code is not compiled.

Change-Id: I78f4f2c07161598336fedcdd4a204379c4deb81b
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/3141579
Commit-Queue: Dan Elphick <delphick@chromium.org>
Reviewed-by: Jakob Kummerow <jkummerow@chromium.org>
Cr-Commit-Position: refs/heads/main@{#76671}

src/wasm/wasm-code-manager.cc

@@ -667,12 +667,13 @@ class CheckWritableMemoryRegions {
     DCHECK(std::none_of(writable_memory_.begin(), writable_memory_.end(),
                         [](auto region) { return region.is_empty(); }));
 
-    // Regions are sorted and disjoint.
-    std::accumulate(writable_memory_.begin(), writable_memory_.end(),
+    // Regions are sorted and disjoint. (std::accumulate has nodiscard on msvc
+    // so USE is required to prevent build failures in debug builds).
+    USE(std::accumulate(writable_memory_.begin(), writable_memory_.end(),
                         Address{0}, [](Address previous_end, auto region) {
                           DCHECK_LT(previous_end, region.begin());
                           return region.end();
-                    });
+                        }));
   }
 
  private: