Merge pull request #4803 from ryanpetris/fix-getuser

Fix Live TV Recording Scheduling

(cherry picked from commit 6274cf8fcc)
Signed-off-by: Joshua M. Boniface <joshua@boniface.me>

Emby.Server.Implementations/HttpServer/Security/SessionContext.cs

@@ -45,7 +45,7 @@ namespace Emby.Server.Implementations.HttpServer.Security
 
         public User GetUser(object requestContext)
         {
-            return GetUser((HttpContext)requestContext);
+            return GetUser(((HttpRequest)requestContext).HttpContext);
         }
     }
 }