Fix Clang warning about tautological compare.

BUG=151927

R=hans@chromium.org

Patch from Hans Wennborg <hans@chromium.org>.

Review URL: https://chromiumcodereview.appspot.com/10985043

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@12621 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/utils.h

@@ -974,7 +974,7 @@ class EnumSet {
   T Mask(E element) const {
     // The strange typing in ASSERT is necessary to avoid stupid warnings, see:
     // http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43680
-    ASSERT(element < static_cast<int>(sizeof(T) * CHAR_BIT));
+    ASSERT(static_cast<int>(element) < static_cast<int>(sizeof(T) * CHAR_BIT));
     return 1 << element;
   }