G_DEFINE_TYPE (PsppireDialogActionKmeans, psppire_dialog_action_kmeans, PSPPIRE_TYPE_DIALOG_ACTION);
static char *
-generate_syntax (PsppireDialogAction *act)
+generate_syntax (const PsppireDialogAction *act)
{
PsppireDialogActionKmeans *km = PSPPIRE_DIALOG_ACTION_KMEANS (act);
gchar *text;