Merge pull request #1374 from TomFischer/FixReadWritePropertiesIssue

Read and write data arrays of type std::size_t under linux and windows in the vtu io.

MeshLib/MeshGenerators/VtkMeshConverter.cpp

@@ -26,6 +26,7 @@
 #include <vtkCharArray.h>
 #include <vtkUnsignedCharArray.h>
 #include <vtkUnsignedLongArray.h>
+#include <vtkUnsignedLongLongArray.h>
 #include <vtkDoubleArray.h>
 #include <vtkIntArray.h>
 
@@ -238,6 +239,13 @@ void VtkMeshConverter::convertArray(vtkDataArray &array, MeshLib::Properties &pr
         return;
     }
 
+    if (vtkUnsignedLongLongArray::SafeDownCast(&array))
+    {
+        VtkMeshConverter::convertTypedArray<unsigned long long>(
+            array, properties, type);
+        return;
+    }
+
     if (vtkUnsignedIntArray::SafeDownCast(&array))
     {
         // MaterialIDs are assumed to be integers