Time::HiRes TMR_newSVnv_mortal() move SvNV_set() after SvNOK_on(), aliasing

-Originally I thought SvANY() aka SvNV_set() needs to be read/written
 first so CC doesn't think SvNOK_on() somehow rewrote SvANY or SvNVX()
 but I was wrong, SvNV_set(_nsv, _nv) was breaking up SvNOK_on() and
 SvTEMP_on() from combining.

Author: bulk88

dist/Time-HiRes/HiRes.xs

@@ -213,8 +213,8 @@ STMT_START { \
 
 #  define TMR_newSVnv_mortal(_nsv, _nv) STMT_START { \
     _nsv = newSV_type_mortal(SVt_NV); \
-    SvNV_set(_nsv, _nv); \
     SvNOK_on(_nsv); \
+    SvNV_set(_nsv, _nv); \
 } STMT_END
 
 #else