It seems that if gtk_window_set_geometry_hints() is used gtk_window_set_resizable() stops working.
gtk_window_set_geometry_hints(GTK_WINDOW(gtk_widget), gtk_widget, &gdk_geometry,
(GdkWindowHints) (GDK_HINT_MIN_SIZE | GDK_HINT_MAX_SIZE | GDK_HINT_RESIZE_INC));
tried this (without success):
gdk_geometry.width_inc = 0;
gdk_geometry.height_inc = 0;
How to make both work together?