Address U-PR comment to null check a function hook

Author: jfreire-unity

Packages/com.unity.inputsystem/InputSystem/Runtime/Actions/InputActionState.cs

@@ -4339,7 +4339,7 @@ private static void InitializeGlobalActionState()
             // Appears we shouldn't really reset globals in case the domain reload is enabled.
             // This is because in that case, we've just had the whole system init'ed via static ctors
             // Moreover, later in GlobalInialize we skip initialization specifically in this case.
-            if (!InputSystem.s_IsDomainReloadDisabled())
+            if (!(InputSystem.s_IsDomainReloadDisabled?.Invoke() ?? false))
                 return;
             #endif