Not showing torrents with invalid categories in listing (#1302)

* Show "unknown" category if name is empty (invalid)

* Don't show torrent in listing if invalid category

templates/site/torrents/listing.jet.html

@@ -52,6 +52,7 @@
   </thead>
   <tbody id="torrentListResults">
     {{ range Models}}
+	{{ if CategoryName(.Category, .SubCategory) != ""}}
     <tr id="torrent_{{ .ID }}" class="torrent-info {{if .Status == 2}}remake{{else if .Status == 3}}trusted{{else if .Status == 4}}aplus{{end}}" >
       {{ if User.HasAdmin() }}
       <td class="tr-cb hide">
@@ -105,6 +106,7 @@
         {{end}}
         <td class="tr-date home-td date-short hide-xs">{{.Date}}</td>
       </tr>
+	  {{end}}
       {{end}}
     </tbody>
   </table>

templates/site/torrents/view.jet.html

@@ -13,7 +13,7 @@
     <tr class="torrent-info-row">
       <td class="torrent-info-td torrent-info-label">{{  T("category") }}:</td>
       <td class="torrent-info-td torrent-info-data" style="padding:0">
-        <a href="{{URL.Parse("/search?c="+Torrent.Category+"_"+Torrent.SubCategory) }}">{{ T(CategoryName(Torrent.Category, Torrent.SubCategory)) }}</a>
+        <a href="{{URL.Parse("/search?c="+Torrent.Category+"_"+Torrent.SubCategory) }}">{{ CategoryName(Torrent.Category, Torrent.SubCategory) == "" ? T("unknown") : T(CategoryName(Torrent.Category, Torrent.SubCategory)) }}</a>
         <br/>
       </td>
       <td class="torrent-info-td torrent-info-label">{{  T("date") }}:</td>