Merge pull request #902 from PlayEveryWare/fix/dispose_safely

fix(playerdatastorage): Explicitly set _instance to null to avoid double release

Author: WispyMouse

com.playeveryware.eos/Runtime/Core/EOS_SDK_Additions/PlayerDataStorageFileTransferRequestWrapper.cs

@@ -53,7 +53,8 @@ public override Result CancelRequest()
 
         public override void Release()
         {
-            _instance.Release();
+            _instance?.Release();
+            _instance = null;
         }
     }
 }

com.playeveryware.eos/Runtime/Core/EOS_SDK_Additions/TitleStorageFileTransferRequestWrapper.cs

@@ -53,6 +53,7 @@ public override Result CancelRequest()
         public override void Release()
         {
             _instance?.Release();
+            _instance = null;
         }
     }
 }