Make VarNode::type() not fail for function refs.
Make VarNode::type() not fail for function refs.

atgeirr/equelle,sintefmath/equelle,sintefmath/equelle,atgeirr/equelle,sintefmath/equelle,sintefmath/equelle,babrodtk/equelle,atgeirr/equelle,sintefmath/equelle,atgeirr/equelle,atgeirr/equelle,babrodtk/equelle,babrodtk/equelle,babrodtk/equelle,atgeirr/equelle,babrodtk/equelle,sintefmath/equelle,sintefmath/equelle,babrodtk/equelle,babrodtk/equelle,sintefmath/equelle,atgeirr/equelle,atgeirr/equelle