Fixed: Don't throw error IMDB mapped movie not found

src/NzbDrone.Core.Test/MetadataSource/SkyHook/SkyHookProxySearchFixture.cs

@@ -39,6 +39,7 @@ namespace NzbDrone.Core.Test.MetadataSource.SkyHook
         [TestCase("tmdbid: -12")]
         [TestCase("tmdbid:1")]
         [TestCase("adjalkwdjkalwdjklawjdlKAJD;EF")]
+        [TestCase("imdb: tt9805708")]
         public void no_search_result(string term)
         {
             var result = Subject.SearchForNewMovie(term);

src/NzbDrone.Core/MetadataSource/SkyHook/SkyHookProxy.cs

@@ -332,9 +332,12 @@ namespace NzbDrone.Core.MetadataSource.SkyHook
                 }
             }
 
-            var resource = response.Resource.movie_results.FirstOrDefault();
+            if (!response.Resource.movie_results.Any())
+            {
+                throw new MovieNotFoundException(imdbId);
+            }
 
-            return MapMovie(resource);
+            return MapMovie(response.Resource.movie_results.First());
         }
 
         public List<Movie> DiscoverNewMovies(string action)