Fix processing of dlist item without definition
Fix processing of dlist item without definition

PissedCapslock/asciidoctor-latex,PissedCapslock/asciidoctor-latex,jxxcarlson/asciidoctor-latex,asciidoctor/asciidoctor-latex,jxxcarlson/asciidoctor-latex,PissedCapslock/asciidoctor-latex,asciidoctor/asciidoctor-latex,jxxcarlson/asciidoctor-latex,asciidoctor/asciidoctor-latex