fdo#39440 the sSymName parameter is now passed by reference

Change-Id: I7292dd2a03c94fd5366220a62334ef6ebac9296c
Reviewed-on: https://gerrit.libreoffice.org/8450
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>