This is a dumb fix to make GCC 13.2 happy.

--- /usr/include/vtk-9.1/vtkSMPTools.h  2021-11-04 16:18:11.000000000 +0100
+++ ../../../sight/lib/io/vtk/patch/vtkSMPTools.h      2025-04-07 11:24:01.180010219 +0200
@@ -30,11 +30,11 @@
 #ifndef vtkSMPTools_h
 #define vtkSMPTools_h
 
-#include "vtkCommonCoreModule.h" // For export macro
-#include "vtkObject.h"
+ #include <vtkCommonCoreModule.h> // For export macro
+ #include <vtkObject.h>
 
-#include "SMP/Common/vtkSMPToolsAPI.h"
-#include "vtkSMPThreadLocal.h" // For Initialized
+ #include <SMP/Common/vtkSMPToolsAPI.h>
+ #include <vtkSMPThreadLocal.h> // For Initialized
 
 #include <functional>  // For std::function
 #include <iterator>    // For std::iterator
@@ -103,7 +103,7 @@
   }
   vtkSMPTools_FunctorInternal<Functor, false>& operator=(
     const vtkSMPTools_FunctorInternal<Functor, false>&);
-  vtkSMPTools_FunctorInternal<Functor, false>(const vtkSMPTools_FunctorInternal<Functor, false>&);
+   vtkSMPTools_FunctorInternal(const vtkSMPTools_FunctorInternal<Functor, false>&);
 };
 
 template <typename Functor>
@@ -134,7 +134,7 @@
   }
   vtkSMPTools_FunctorInternal<Functor, true>& operator=(
     const vtkSMPTools_FunctorInternal<Functor, true>&);
-  vtkSMPTools_FunctorInternal<Functor, true>(const vtkSMPTools_FunctorInternal<Functor, true>&);
+   vtkSMPTools_FunctorInternal(const vtkSMPTools_FunctorInternal<Functor, true>&);
 };
 
 template <typename Functor>