Make HSessionObj implement IDisposable (#10)

* Make HSessionObj implement IDisposable, so that objects that have handles created to them are disposed when the handles are closed.

* Spelling fix: GenertateObjectId -> GenerateObjectId

Ryujinx/OsHle/Handles/HSessionObj.cs

@@ -1,6 +1,8 @@
+using System;
+
 namespace Ryujinx.OsHle.Handles
 {
-    class HSessionObj : HSession
+    class HSessionObj : HSession, IDisposable
     {
         public object Obj { get; private set; }
 
@@ -8,5 +10,21 @@ namespace Ryujinx.OsHle.Handles
         {
             this.Obj = Obj;
         }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool Disposing)
+        {
+            if(Disposing && Obj != null)
+            {
+                if(Obj is IDisposable DisposableObj)
+                {
+                    DisposableObj.Dispose();
+                }
+            }
+        }
     }
 }