Don't ever attempt to initialise a std::locale with a UTF-8 locale on Windows -*- Mode: Diff -*-

--- libs/locale/src/boost/locale/std/std_backend.cpp
+++ libs/locale/src/boost/locale/std/std_backend.cpp
@@ -86,6 +86,7 @@
 #endif
                 utf_mode_ = utf8_support::none;
             } else {
+                #if !defined(BOOST_WINDOWS)
                 if(loadable(lid)) {
                     name_ = lid;
                     utf_mode_ = utf8_support::native_with_wide;
@@ -98,8 +99,8 @@
                     utf_mode_ = utf8_support::from_wide;
 #endif
                 }
-#if defined(BOOST_WINDOWS)
-                else if(loadable(win_name))
+                #else
+                if(loadable(win_name))
                 {
                     name_ = win_name;
                     utf_mode_ = utf8_support::from_wide;