Fix shows not showing in watchlist

TV shows have a `null` video property so they wouldn't appear. It was changed so that it checks if it has a `tvShow` or a `video`

Author: darkarp

grails-app/controllers/streama/WatchlistEntryController.groovy

@@ -101,7 +101,7 @@ class WatchlistEntryController {
       user == currentUser
       profile == currentProfile
       isDeleted == false
-      video != null
+      video != null || tvShow != null
     }.list(sort: sortingColumn, order: sortingOrder)
     if(!watchlistEntries){
       render status: NO_CONTENT