It's a bad style, doing that in headers can affect many source files
(especially with PCH used).
Change-Id: Ic9091a1d018e74606c9fa95df71a55faaa93d4ac
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/119011
Tested-by: Jenkins
Reviewed-by: Luboš Luňák <l.lunak@collabora.com>
