Most of the changes are related to newly allocated memory, so we are
sure it can not overlap with the source of the copy.

Change-Id: Ie6ccf1bbb07b792fb18601a38dfaa55755d14b7d
Signed-off-by: jailletc36 <christophe.jaillet@wanadoo.fr>
Reviewed-on: https://gerrit.libreoffice.org/1033Reviewed-by: Tor Lillqvist <tml@iki.fi>
Tested-by: Caolán McNamara <caolanm@redhat.com>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>