Author: Francois Mazen <francois@mzf.fr>
Description: improve error logging when Assimp fails to loas a file.
Forwarded: not-needed

--- a/library/VTKExtensions/Readers/vtkF3DAssimpImporter.cxx
+++ b/library/VTKExtensions/Readers/vtkF3DAssimpImporter.cxx
@@ -581,6 +581,9 @@
     else
     {
       vtkWarningWithObjectMacro(this->Parent, "Assimp failed to load: " << filePath);
+
+      auto errorDescription = this->Importer.GetErrorString();
+      vtkWarningWithObjectMacro(this->Parent, "Assimp error: " << errorDescription);
     }
   }