Fix exception when trying to read output pointer buffer size (#6221)

* Fix exception when trying to read output pointer buffer size

* Better name

src/Ryujinx.Horizon/Sdk/Sf/Hipc/HipcMessageData.cs

@@ -9,6 +9,7 @@ namespace Ryujinx.Horizon.Sdk.Sf.Hipc
         public Span<HipcBufferDescriptor> ReceiveBuffers;
         public Span<HipcBufferDescriptor> ExchangeBuffers;
         public Span<uint> DataWords;
+        public Span<uint> DataWordsPadded;
         public Span<HipcReceiveListEntry> ReceiveList;
         public Span<int> CopyHandles;
         public Span<int> MoveHandles;