Fixed: Exclude invalid releases from Newznab and Torznab parsers

(cherry picked from commit fb060730c7d52cd342484dc68595698a9430df7b)

src/NzbDrone.Core/Indexers/Newznab/NewznabRssParser.cs

@@ -72,16 +72,17 @@ namespace NzbDrone.Core.Indexers.Newznab
         protected override bool PostProcess(IndexerResponse indexerResponse, List<XElement> items, List<ReleaseInfo> releases)
         {
             var enclosureTypes = items.SelectMany(GetEnclosures).Select(v => v.Type).Distinct().ToArray();
+
             if (enclosureTypes.Any() && enclosureTypes.Intersect(PreferredEnclosureMimeTypes).Empty())
             {
                 if (enclosureTypes.Intersect(TorrentEnclosureMimeTypes).Any())
                 {
                     _logger.Warn("{0} does not contain {1}, found {2}, did you intend to add a Torznab indexer?", indexerResponse.Request.Url, NzbEnclosureMimeType, enclosureTypes[0]);
+
+                    return false;
                 }
-                else
+
-                {
+                _logger.Warn("{0} does not contain {1}, found {2}.", indexerResponse.Request.Url, NzbEnclosureMimeType, enclosureTypes[0]);
-                    _logger.Warn("{1} does not contain {1}, found {2}.", indexerResponse.Request.Url, NzbEnclosureMimeType, enclosureTypes[0]);
-                }
             }
 
             return true;

src/NzbDrone.Core/Indexers/RssParser.cs

@@ -275,9 +275,9 @@ namespace NzbDrone.Core.Indexers
                             Length = v.Attribute("length")?.Value?.ParseInt64() ?? 0
                         };
                     }
-                                     catch (Exception e)
+                    catch (Exception ex)
                     {
-                                         _logger.Warn(e, "Failed to get enclosure for: {0}", item.Title());
+                        _logger.Warn(ex, "Failed to get enclosure for: {0}", item.Title());
                     }
 
                     return null;

src/NzbDrone.Core/Indexers/Torznab/TorznabRssParser.cs

@@ -76,16 +76,17 @@ namespace NzbDrone.Core.Indexers.Torznab
         protected override bool PostProcess(IndexerResponse indexerResponse, List<XElement> items, List<ReleaseInfo> releases)
         {
             var enclosureTypes = items.SelectMany(GetEnclosures).Select(v => v.Type).Distinct().ToArray();
+
             if (enclosureTypes.Any() && enclosureTypes.Intersect(PreferredEnclosureMimeTypes).Empty())
             {
                 if (enclosureTypes.Intersect(UsenetEnclosureMimeTypes).Any())
                 {
                     _logger.Warn("{0} does not contain {1}, found {2}, did you intend to add a Newznab indexer?", indexerResponse.Request.Url, TorrentEnclosureMimeType, enclosureTypes[0]);
+
+                    return false;
                 }
-                else
+
-                {
+                _logger.Warn("{0} does not contain {1}, found {2}.", indexerResponse.Request.Url, TorrentEnclosureMimeType, enclosureTypes[0]);
-                    _logger.Warn("{1} does not contain {1}, found {2}.", indexerResponse.Request.Url, TorrentEnclosureMimeType, enclosureTypes[0]);
-                }
             }
 
             return true;