shlwapi: Fix wnsprintfW/wvnsprintfW %C conversion.

Signed-off-by: Akihiro Sagawa <sagawa.aki@gmail.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

shlwapi: Fix wnsprintfW/wvnsprintfW %C conversion.
850b63b6 · Akihiro Sagawa · Alexandre Julliard · e98dbf2e · 850b63b6
Commit 850b63b6 authored Feb 19, 2020 by Akihiro Sagawa Committed by Alexandre Julliard Feb 19, 2020
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wsprintf.c dlls/shlwapi/wsprintf.c +9 -2

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--- a/dlls/shlwapi/wsprintf.c
+++ b/dlls/shlwapi/wsprintf.c
@@ -525,8 +525,15 @@ INT WINAPI wvnsprintfW( LPWSTR buffer, INT maxlen, LPCWSTR spec, __ms_va_list ar
            *p++ = argData.wchar_view;
            break;
        case WPR_CHAR:
-            *p++ = argData.char_view;
-            break;
+            {
+                WCHAR wc;
+                if (!IsDBCSLeadByte( (BYTE)argData.char_view )
+                    && MultiByteToWideChar( CP_ACP, 0, &argData.char_view, 1, &wc, 1 ) > 0)
+                    *p++ = wc;
+                else
+                    *p++ = 0;
+                break;
+            }
        case WPR_STRING:
            {
                LPCSTR ptr = argData.lpcstr_view;