Fix check FastScape fields

source/mesh_deformation/fastscape.cc

@@ -228,15 +228,18 @@ namespace aspect
  const std::vector<std::string> chemical_field_names = this->introspection().chemical_composition_field_names();
  if (this->introspection().compositional_name_exists("sediment_age"))
  {
- AssertThrow(chemical_field_names.find("sediment_age") == std::string::npos,
- ExcMessage("There is a field sediment_age that is of type chemical composition. "
- "Please change it to type generic so that it does not affect material properties."));
+ const std::vector<std::string>::const_iterator
+ it = std::find(chemical_field_names.begin(), chemical_field_names.end(), "sediment_age");
+ AssertThrow (it == chemical_field_names.end(),
+ ExcMessage("There is a field sediment_age that is of type chemical composition. "
+ "Please change it to type generic so that it does not affect material properties."));
  }
  if (this->introspection().compositional_name_exists("deposition_depth"))
- {
- AssertThrow(chemical_field_names.find("deposition_depth") != std::string::npos,
- ExcMessage("There is a field deposition_depth that is of type chemical composition. "
- "Please change it to type generic so that it does not affect material properties."));
+ { const std::vector<std::string>::const_iterator
+ it = std::find(chemical_field_names.begin(), chemical_field_names.end(), "deposition_depth");
+ AssertThrow (it == chemical_field_names.end(),
+ ExcMessage("There is a field deposition_depth that is of type chemical composition. "
+ "Please change it to type generic so that it does not affect material properties."));
  }
 
  // Initialize parameters for restarting FastScape