GTK. Изменить цвет текста в таблице (дереве).

enum{COLUMN_NAME, COLUMN_VARIABLE, N_COLUMNS, COLORTEXT};
...
GdkRGBA color= {0.0, 0.5, 0.9, 0.5};
GtkWidget *tree;
	GtkTreeStore *store;
	GtkTreeIter iter, citer;
	GtkCellRenderer *renderer;
	GtkTreeViewColumn *column;
tree = gtk_tree_view_new();

	store = gtk_tree_store_new(N_COLUMNS, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_BOOLEAN);
	gtk_tree_view_set_model(GTK_TREE_VIEW(tree), GTK_TREE_MODEL(store));


	renderer = gtk_cell_renderer_text_new();
	column = gtk_tree_view_column_new_with_attributes ("Item", renderer, "text", COLUMN_NAME, "foreground-rgba", COLORTEXT, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);
	renderer = gtk_cell_renderer_text_new(); 
	  
	column = gtk_tree_view_column_new_with_attributes ("Num", renderer,  "text", COLUMN_VARIABLE, "foreground-rgba", COLORTEXT, NULL);
	gtk_tree_view_append_column(GTK_TREE_VIEW(tree), column);

	gchar i[]={"hello"};
	gtk_tree_store_append(store, &iter, NULL);
	gtk_tree_store_set(store, &iter, COLUMN_NAME, "Центральный процессор", COLUMN_VARIABLE, "lala", COLORTEXT, color,   -1);

	gtk_tree_store_append(store, &citer, &iter);
	gtk_tree_store_set(store, &citer, COLUMN_NAME, "apple", COLUMN_VARIABLE,  &i,  COLORTEXT, color, -1);
...

(hello:11715): Gtk-WARNING **: /build/buildd/gtk+3.0-3.14.12/./gtk/gtktreestore.c:1042: Invalid column number 3 added to iter (remember to end your list of columns with a -1)

(hello:11715): Gtk-WARNING **: /build/buildd/gtk+3.0-3.14.12/./gtk/gtktreestore.c:1042: Invalid column number 3 added to iter (remember to end your list of columns with a -1)

(hello:11715): Gtk-CRITICAL **: gtk_tree_store_get_value: assertion 'column < priv->n_columns' failed

(hello:11715): GLib-GObject-CRITICAL **: g_object_set_property: assertion 'G_IS_VALUE (value)' failed