vs2015: fix narrowing warnings in sandbox/win/

sandbox/win/src/eat_resolver.cc

Index: sandbox/win/src/eat_resolver.cc
diff --git a/sandbox/win/src/eat_resolver.cc b/sandbox/win/src/eat_resolver.cc
index 328ee00f2f171f3b43d6371badd6f084bbf692bd..1675ce84eb02172e8488de77ae344c4835dff8f2 100644
--- a/sandbox/win/src/eat_resolver.cc
+++ b/sandbox/win/src/eat_resolver.cc
@@ -45,12 +45,8 @@ NTSTATUS EatResolverThunk::Setup(const void* target_module,
     return ret;
 
   // Perform the patch.
-#pragma warning(push)
-#pragma warning(disable: 4311)
-  // These casts generate warnings because they are 32 bit specific.
-  *eat_entry_ = reinterpret_cast<DWORD>(thunk_storage) -
-                reinterpret_cast<DWORD>(target_module);
-#pragma warning(pop)
+  *eat_entry_ = static_cast<DWORD>(reinterpret_cast<uintptr_t>(thunk_storage)) -
+                static_cast<DWORD>(reinterpret_cast<uintptr_t>(target_module));
 
   if (NULL != storage_used)
     *storage_used = GetThunkSize();