tdf#152994 actually return in this case

Change-Id: I40cb4dc4ce1fd3caa2464f92803124c3d2107afb
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/145433
Tested-by: Jenkins
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
diff --git a/vcl/win/gdi/salnativewidgets-luna.cxx b/vcl/win/gdi/salnativewidgets-luna.cxx
index b2c71bf..1c177a1 100644
--- a/vcl/win/gdi/salnativewidgets-luna.cxx
+++ b/vcl/win/gdi/salnativewidgets-luna.cxx
@@ -400,7 +400,7 @@ bool UseDarkMode()
{
    static bool bOSSupportsDarkMode = OSSupportsDarkMode();
    if (!bOSSupportsDarkMode)
        false;
        return false;

    HINSTANCE hUxthemeLib = LoadLibraryExW(L"uxtheme.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32);
    if (!hUxthemeLib)