Fixed bug in ZOOM_options_getl WRT setting of parameter lenp.
Fixed bug in ZOOM_options_getl WRT setting of parameter lenp.

Fixed bug in ZOOM_options_getl WRT setting of parameter lenp that
would be unset if a callback_handle is used to retrieve the options
value. This bug caused ZOOM extended services update to malfunction.

dcrossleyau/yaz,nla/yaz,nla/yaz,nla/yaz,dcrossleyau/yaz,dcrossleyau/yaz,nla/yaz