Nikolay Sivov : ntdll: Use system language as preferred, if user language is custom-unspecified.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 29cbec5e6c262239edbfafd5ccd94d8ade44cddf
URL:    https://gitlab.winehq.org/wine/wine/-/commit/29cbec5e6c262239edbfafd5ccd94d8...

Author: Nikolay Sivov <nsivov(a)codeweavers.com>
Date:   Tue Nov 22 17:14:11 2022 +0300

ntdll: Use system language as preferred, if user language is custom-unspecified.

Signed-off-by: Nikolay Sivov <nsivov(a)codeweavers.com>

---

 dlls/ntdll/locale.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/dlls/ntdll/locale.c b/dlls/ntdll/locale.c
index 7e1a2c96eaa..26302cfb376 100644
--- a/dlls/ntdll/locale.c
+++ b/dlls/ntdll/locale.c
@@ -193,13 +193,16 @@ static NTSTATUS get_dummy_preferred_ui_language( DWORD flags, LANGID lang, ULONG
     NTSTATUS status;
     ULONG len;
 
-    FIXME("(0x%lx %p %p %p) returning a dummy value (current locale)\n", flags, count, buffer, size);
+    FIXME("(0x%lx %#x %p %p %p) returning a dummy value (current locale)\n", flags, lang, count, buffer, size);
 
     if (flags & MUI_LANGUAGE_ID) swprintf( name, ARRAY_SIZE(name), L"%04lX", lang );
     else
     {
         UNICODE_STRING str;
 
+        if (lang == LOCALE_CUSTOM_UNSPECIFIED)
+            NtQueryInstallUILanguage( &lang );
+
         str.Buffer = name;
         str.MaximumLength = sizeof(name);
         status = RtlLcidToLocaleName( lang, &str, 0, FALSE );