...recently introduced with 52a49f9e48
"static_assert that O[U]StringLiteral are layout compatible with rtl_[u]String"
Change-Id: Ie89e92aa4230329aa582c4211c2001117d2287b5
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103138
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>