NPE thrown from DocumentCleaner

[andy-m]

Running goose against the url "http://www.apo-rot.de/indexdetails.html?_filterartnr=1997030&partnerid=preisfuerst"
we recieve the following NPE:

java.lang.NullPointerException
at com.gravity.goose.cleaners.DocumentCleaner$class.cleanBadTags(DocumentCleaner.scala:132)
at com.gravity.goose.cleaners.DocumentCleaner$class.clean(DocumentCleaner.scala:51)
at com.gravity.goose.cleaners.StandardDocumentCleaner.clean(StandardDocumentCleaner.scala:26)
at com.gravity.goose.Crawler$$anonfun$crawl$1$$anonfun$apply$1$$anonfun$apply$2.apply(Crawler.scala:71)
at com.gravity.goose.Crawler$$anonfun$crawl$1$$anonfun$apply$1$$anonfun$apply$2.apply(Crawler.scala:48)