Fix a strict aliasing bug in x64 release build....

src/handles.h

Index: src/handles.h
===================================================================
--- src/handles.h	(revision 2670)
+++ src/handles.h	(working copy)
@@ -126,7 +126,7 @@
     // handle, and return the result.
     ASSERT(result < current_.limit);
     current_.next = result + 1;
-    *reinterpret_cast<Object**>(result) = value;
+    memcpy(result, &value, sizeof(value));
     return reinterpret_cast<Object**>(result);
   }