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call _set_FMA3_enable only on vs 2013 (avx2 bug)

ref link:
http://web.archive.org/web/20150325003447/http://connect.microsoft.com/VisualStudio/feedback/details/811093

this fixes the build on mingw

--- a/codec/encoder/core/inc/param_svc.h

+++ b/codec/encoder/core/inc/param_svc.h

@@ -63,7 +63,7 @@

 * \return   2 based scaling factor

 */

 static inline uint32_t GetLogFactor (float base, float upper) {

-#if defined(_M_X64)

+#if defined(_M_X64) && _MSC_VER == 1800

   _set_FMA3_enable(0);

 #endif

   const double dLog2factor      = log10 (1.0 * upper / base) / log10 (2.0);