Fixed: Incorrect api error when calling /api/episode without seriesId queryparam.

fixes #1070

src/NzbDrone.Api/EpisodeFiles/EpisodeFileModule.cs

@@ -52,16 +52,16 @@ namespace NzbDrone.Api.EpisodeFiles
 
         private List<EpisodeFileResource> GetEpisodeFiles()
         {
-            var seriesId = (int?)Request.Query.SeriesId;
-
-            if (seriesId == null)
+            if (!Request.Query.SeriesId.HasValue)
             {
                 throw new BadRequestException("seriesId is missing");
             }
 
-            var series = _seriesService.GetSeries(seriesId.Value);
+            var seriesId = (int)Request.Query.SeriesId;
+
+            var series = _seriesService.GetSeries(seriesId);
 
-            return _mediaFileService.GetFilesBySeries(seriesId.Value)
+            return _mediaFileService.GetFilesBySeries(seriesId)
                                     .Select(f => MapToResource(series, f)).ToList();
         }
 

src/NzbDrone.Api/Episodes/EpisodeModule.cs

@@ -20,14 +20,14 @@ namespace NzbDrone.Api.Episodes
 
         private List<EpisodeResource> GetEpisodes()
         {
-            var seriesId = (int?)Request.Query.SeriesId;
-
-            if (seriesId == null)
+            if (!Request.Query.SeriesId.HasValue)
             {
                 throw new BadRequestException("seriesId is missing");
             }
 
-            var resources = ToListResource(_episodeService.GetEpisodeBySeries(seriesId.Value));
+            var seriesId = (int)Request.Query.SeriesId;
+
+            var resources = ToListResource(_episodeService.GetEpisodeBySeries(seriesId));
 
             return resources;
         }

src/NzbDrone.Api/Episodes/RenameEpisodeModule.cs

@@ -18,18 +18,13 @@ namespace NzbDrone.Api.Episodes
 
         private List<RenameEpisodeResource> GetEpisodes()
         {
-            int seriesId;
-
-            if (Request.Query.SeriesId.HasValue)
-            {
-                seriesId = (int)Request.Query.SeriesId;
-            }
-
-            else
+            if (!Request.Query.SeriesId.HasValue)
             {
                 throw new BadRequestException("seriesId is missing");
             }
 
+            var seriesId = (int)Request.Query.SeriesId;
+
             if (Request.Query.SeasonNumber.HasValue)
             {
                 var seasonNumber = (int)Request.Query.SeasonNumber;