...similar to 3db830d3 "Silence new Clang trunk
-Wdefaulted-function-deleted", after fb1d3b58
"loplugin:constfields in sc"

Change-Id: I8358e862e53dd8f57169ba2d2f2c543edb93e2a5
Reviewed-on: https://gerrit.libreoffice.org/61867
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>