Fix wxUILocale::GetPreferredUILanguages() under Windows < 10

Return the default locale name under old Windows versions instead of
always returning an empty vector and logging a spurious error.

Closes #23416.

src/msw/uilocale.cpp

@@ -271,7 +271,7 @@ public:
         {
             // Use the default user locale for Windows 7 resp Windows 8.x and below
             wchar_t buf[LOCALE_NAME_MAX_LENGTH];
-            if (!::GetUserDefaultLocaleName(buf, LOCALE_NAME_MAX_LENGTH))
+            if (::GetUserDefaultLocaleName(buf, LOCALE_NAME_MAX_LENGTH))
             {
                 preferred.push_back(buf);
             }