gtk-tree-model-sort-reset-default-sort-func (model)

model -- a gtk-tree-model-sort object

This resets the default sort function to be in the 'unsorted' state. That is, it is in the same order as the child model. It will re-sort the model to be in the same order as the child model only if the gtk-tree-model-sort object is in 'unsorted' state.