Merge pull request #1909 from KerryRJ/FixDvdsFailingToPlay

Fix System.NullReferenceException when playing Dvds copied to HDD

(cherry picked from commit fdb0c3a1df)
Signed-off-by: Joshua Boniface <joshua@boniface.me>

MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs

@@ -1173,7 +1173,6 @@ namespace MediaBrowser.Controller.MediaEncoding
                 {
                     bitrate = GetMinBitrate(videoStream.BitRate.Value, bitrate.Value);
                 }
-            }
 
                 if (bitrate.HasValue)
                 {
@@ -1186,6 +1185,7 @@ namespace MediaBrowser.Controller.MediaEncoding
                         bitrate = Math.Min(bitrate.Value, request.VideoBitRate.Value);
                     }
                 }
+            }
 
             return bitrate;
         }