Fixed torznab searching without any id or q.

Fixes #849

src/NzbDrone.Core.Test/IndexerTests/NewznabTests/NewznabRequestGeneratorFixture.cs

@@ -219,6 +219,21 @@ namespace NzbDrone.Core.Test.IndexerTests.NewznabTests
             page.Url.Query.Should().Contain("rid=10");
         }
 
+        [Test]
+        public void should_not_use_aggregrated_id_search_if_no_ids_supported()
+        {
+            _capabilities.SupportedTvSearchParameters = new[] { "q", "season", "ep" };
+            _capabilities.SupportsAggregateIdSearch = true; // Turns true if indexer supplies supportedParams.
+
+            var results = Subject.GetSearchRequests(_singleEpisodeSearchCriteria);
+            results.Tiers.Should().Be(1);
+            results.GetTier(0).Should().HaveCount(1);
+
+            var page = results.GetTier(0).First().First();
+
+            page.Url.Query.Should().Contain("q=");
+        }
+
         [Test]
         public void should_fallback_to_q()
         {

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

@@ -183,7 +183,7 @@ namespace NzbDrone.Core.Indexers.Newznab
 
         private void AddTvIdPageableRequests(IndexerPageableRequestChain chain, int maxPages, IEnumerable<int> categories, SearchCriteriaBase searchCriteria, string parameters)
         {
-            if (SupportsAggregatedIdSearch)
+            if (SupportsAggregatedIdSearch && (SupportsTvdbSearch || SupportsTvRageSearch || SupportsTvMazeSearch))
             {
                 var ids = "";