Annots: check for form object
before calling methods on it, because
by de-facto it's possible for a pdf
to have form fields but not have a
Catalog root Form object.
Fixes crash from issue #1018 (closed)
before calling methods on it, because
by de-facto it's possible for a pdf
to have form fields but not have a
Catalog root Form object.
Fixes crash from issue #1018 (closed)