Use InitializeCriticalSectionEx for Windows Store or Windows Phone apps

The old InitializeCriticalSection function isn't available in
these API partitions, and the new InitializeCriticalSectionEx
function is only available since Vista, so we want to keep using
the old function for normal desktop code.

codec/processing/src/common/thread.cpp

@@ -43,6 +43,12 @@ WELSVP_NAMESPACE_BEGIN
 
 #if defined(_WIN32)
 
+#ifdef WINAPI_FAMILY
+#if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
+#define InitializeCriticalSection(x) InitializeCriticalSectionEx(x, 0, 0)
+#endif
+#endif
+
 WELS_THREAD_ERROR_CODE    WelsMutexInit (WELS_MUTEX*    mutex) {
   InitializeCriticalSection (mutex);