Silence Win warnings

src/types.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 426 matching lines @@
   }
   static void union_set(Unioned* unioned, int i, Type* type) {
     ASSERT(!is_union(type));
     tagged_set(tagged_from_union(unioned), i, type);
   }
   static int union_length(Unioned* unioned) {
     return tagged_length(tagged_from_union(unioned));
   }
   static int lub_bitset(Type* type) {
     ASSERT(is_class(type) || is_constant(type));
-    return tagged_get<intptr_t>(as_tagged(type), 0);
+    return static_cast<int>(tagged_get<intptr_t>(as_tagged(type), 0));
   }
 };
 
 
 // Heap-allocated types are either smis for bitsets, maps for classes, boxes for
 // constants, or fixed arrays for unions.
 struct HeapTypeConfig {
   typedef TypeImpl<HeapTypeConfig> Type;
   typedef i::Object Base;
   typedef i::FixedArray Unioned;
@@ skipping 123 matching lines @@
     return that.lower->Is(this->lower) && this->upper->Is(that.upper);
   }
 };
 
 typedef BoundsImpl<ZoneTypeConfig> Bounds;
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPES_H_