openimageio createlocale hack

--- oiio-Release-2.0.9/src/libutil/strutil.cpp.orig	2019-07-31 21:11:04.159918000 +0300
+++ oiio-Release-2.0.9/src/libutil/strutil.cpp	2019-07-31 21:13:44.496999600 +0300
@@ -53,6 +53,15 @@
 
 #ifdef _WIN32
 #    include <shellapi.h>
+#    define locale_t _locale_t
+#if defined(__MINGW32__)
+inline  locale_t createlocale(int _Category,const char *_Locale) {
+    locale_t loc;
+    return loc;
+}
+#else
+#   define createlocale _create_locale
+#endif
 #endif
 
 
@@ -1227,9 +1236,9 @@
 #    else
     return strtof_l(nptr, endptr, c_loc);
 #    endif
-#elif defined (_MSC_VER)
+#elif defined (_WIN32)
     // Windows has _strtod_l
-    static _locale_t c_loc = _create_locale(LC_ALL, "C");
+    static _locale_t c_loc = createlocale(LC_ALL, "C");
     return static_cast<float>(_strtod_l(nptr, endptr, c_loc));
 #else
     // On platforms without strtof_l...
@@ -1265,9 +1274,9 @@
     // static initialization inside function is thread-safe by C++11 rules!
     static locale_t c_loc = newlocale(LC_ALL_MASK, "C", nullptr);
     return strtod_l(nptr, endptr, c_loc);
-#elif defined (_MSC_VER)
+#elif defined (_WIN32)
     // Windows has _strtod_l
-    static _locale_t c_loc = _create_locale(LC_ALL, "C");
+    static _locale_t c_loc = createlocale(LC_ALL, "C");
     return _strtod_l(nptr, endptr, c_loc);
 #else
     // On platforms without strtod_l...