The result of osl_getCurrentSecurity () should always be deleted again
with osl_freeSecurityHandle ().

Change-Id: If0991937fcb24207d1f78166f61c4be22d423629
Reviewed-on: https://gerrit.libreoffice.org/4947Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>