IGN:Misc bug fixes

src/calibre/library/database2.py

@@ -1335,6 +1335,8 @@ def get_data_as_dict(self, prefix=None, authors_as_string=False):
             data.append(x)
             x['id'] = record[FIELD_MAP['id']]
             x['formats'] = []
+            if not x['authors']:
+                x['authors'] = _('Unknown')
             x['authors'] = [i.replace('|', ',') for i in x['authors'].split(',')]
             if authors_as_string:
                 x['authors'] = authors_to_string(x['authors'])

src/calibre/web/feeds/recipes/__init__.py

@@ -44,7 +44,7 @@
            'stackoverflow', 'telepolis_artikel', 'zaobao', 'usnews',
            'straitstimes', 'index_hu', 'pcworld_hu', 'hrt', 'rts',
            'h1', 'h2', 'h3', 'phd_comics', 'woz_die', 'elektrolese',
-           'climate_progress', 'carta',
+           'climate_progress', 'carta', 'slashdot',
           )]
 
 import re, imp, inspect, time, os