Fix missing listing name when using syntax highlighting
Fix missing listing name when using syntax highlighting

When using syntax highlighting in review-pdfmaker, a caption of list
does not have a prefix such as 'リスト' or 'List' etc.

Actual caption: 1.1 Sample Code
Expected caption: List 1.1 Sample Code

This is because the value of lstlistingname is always empty.

suzuki/review,takahashim/review,krororo/review,kmuto/review,suzuki/review,krororo/review,kmuto/review,murashitas/review,kuad9/review_study,masawada/review,krororo/review,takahashim/review,kuad9/review_study,kmuto/review,orangain/review,murashitas/review,masawada/review,orangain/review