Because visual c++ compiler may not support it without creating a
constructor for the struct.

Change-Id: I6c8868c4e34cbe7b67e413b1db18aed01378c959
Reviewed-on: https://gerrit.libreoffice.org/65905Reviewed-by: Andras Timar <andras.timar@collabora.com>
Tested-by: Andras Timar <andras.timar@collabora.com>