Fix capitalization of Playstate message

Emby.Dlna/PlayTo/PlayToController.cs

@@ -826,7 +826,7 @@ namespace Emby.Dlna.PlayTo
                 return SendPlayCommand(data as PlayRequest, cancellationToken);
             }
 
-            if (name == SessionMessageType.PlayState)
+            if (name == SessionMessageType.Playstate)
             {
                 return SendPlaystateCommand(data as PlaystateRequest, cancellationToken);
             }

Emby.Server.Implementations/Session/SessionManager.cs

@@ -1310,7 +1310,7 @@ namespace Emby.Server.Implementations.Session
                 }
             }
 
-            return SendMessageToSession(session, SessionMessageType.PlayState, command, cancellationToken);
+            return SendMessageToSession(session, SessionMessageType.Playstate, command, cancellationToken);
         }
 
         private static void AssertCanControl(SessionInfo session, SessionInfo controllingSession)

MediaBrowser.Model/Session/SessionMessageType.cs

@@ -15,7 +15,7 @@ namespace MediaBrowser.Model.Session
         Play,
         SyncPlayCommand,
         SyncPlayGroupUpdate,
-        PlayState,
+        Playstate,
         RestartRequired,
         ServerShuttingDown,
         ServerRestarting,