Struct constraint on dispatch parameters can now be enforced

Runtime/Common/FfxPassBase.cs

@@ -6,7 +6,7 @@ using UnityEngine.Rendering;
 namespace FidelityFX
 {
     internal abstract class FfxPassBase<TDispatch>: IDisposable
-        //where TDispatch: struct
+        where TDispatch: struct
     {
         private readonly string _techName;
         
@@ -47,7 +47,7 @@ namespace FidelityFX
     }
 
     internal abstract class FfxPassWithFlags<TDispatch, TFlags> : FfxPassBase<TDispatch>
-        //where TDispatch: struct
+        where TDispatch: struct
         where TFlags: Enum
     {
         protected readonly TFlags Flags;