Use intrinsic to get double as int, instead of taking address which challenges the compiler.

Author: jaykrell

lib/Runtime/Library/JavascriptNumber.inl

@@ -147,7 +147,11 @@ namespace Js
 
     inline Var JavascriptNumber::ToVar(double value)
     {
+#if defined(_MSC_VER) && defined(_AMD64_)
+        uint64 val = _mm_cvtsi128_si64(_mm_castpd_si128(_mm_set_sd(value)));
+#else
         uint64 val = *(uint64*)&value;
+#endif
         AssertMsg(!IsNan(value) || ToSpecial(value) == k_NegativeNan || ToSpecial(value) == 0x7FF8000000000000ull, "We should only produce a NaN with this value");
         return reinterpret_cast<Var>(val ^ FloatTag_Value);
     }