fix NPE in location search on missing/empty PubDate in underlaying rss data

htroot/yacysearch_location.java

@@ -113,7 +113,7 @@ public class yacysearch_location {
                     prop.put("kml_placemark_" + placemarkCounter + "_copyright", message.getCopyright());
                     prop.put("kml_placemark_" + placemarkCounter + "_subject", message.getSubject());
                     prop.put("kml_placemark_" + placemarkCounter + "_description", message.getDescriptions().size() > 0 ? message.getDescriptions().get(0) : "");
-                    prop.put("kml_placemark_" + placemarkCounter + "_date", message.getPubDate());
+                    prop.put("kml_placemark_" + placemarkCounter + "_date", (message.getPubDate() != null) ? message.getPubDate() : new Date());
                     prop.putXML("kml_placemark_" + placemarkCounter + "_url", message.getLink());
                     prop.put("kml_placemark_" + placemarkCounter + "_pointname", message.getTitle());
                     prop.put("kml_placemark_" + placemarkCounter + "_lon", lo);

source/net/yacy/cora/document/feed/RSSMessage.java

@@ -212,9 +212,13 @@ public class RSSMessage implements Hit, Comparable<RSSMessage>, Comparator<RSSMe
         return Token.language.valueFrom(this.map, "");
     }
 
+    /**
+     * @return publishDate or null
+     */
     @Override
     public Date getPubDate() {
         final String dateString = Token.pubDate.valueFrom(this.map, "");
+        if (!dateString.isEmpty()) { // skip parse exception on empty string
             Date date;
             try {
                 date = HeaderFramework.FORMAT_RFC1123.parse(dateString);
@@ -222,11 +226,13 @@ public class RSSMessage implements Hit, Comparable<RSSMessage>, Comparator<RSSMe
                 try {
                     date = GenericFormatter.SHORT_SECOND_FORMATTER.parse(dateString);
                 } catch (final ParseException e1) {
-                date = HeaderFramework.parseHTTPDate(dateString);
+                    date = HeaderFramework.parseHTTPDate(dateString); // returns null on parse error
                 }
             }
             return date;
         }
+        return null;
+    }
 
     @Override
     public String getGuid() {