Adapt implicit OString return value construction to C++23 P2266R1

With the recent implementation of
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2266r1.html> "P2266R1:
Simpler implicit move" in Clang 13 trunk as
<https://github.com/llvm/llvm-project/commit/bf20631782183cd19e0bb7219e908c2bbb01a75f>
"[clang] Implement P2266 Simpler implicit move", a --with-latest-c++ build
started to fail with

> comphelper/source/xml/xmltools.cxx:103:20: error: no viable conversion from returned value of type 'char [39]' to function return type 'rtl::OString'
>             return str;
>                    ^~~
[...]
> include/rtl/string.hxx:277:5: note: candidate constructor [with T = char [39]] not viable: expects an lvalue for 1st argument
>     OString( T& value, typename libreoffice_internal::NonConstCharArrayDetector< T, libreoffice_internal::Dummy >::Type = libreoffice_internal::Dummy() )
>     ^
[...]

etc.

Change-Id: If34f143a1855fdd7cd22ea3d7594f9381d50a7ec
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117336
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

0 files changed, 0 insertions, 0 deletions