col = my_iemgui_color_hex[col];   }   sprintf(fgstring, "#%0.0x", x->x_gui.x_fcol);   sprintf(bgstring, "#%0.0x", x->x_gui.x_bcol);   gui_vmess("gui_room_sim_colors", "xxss",     canvas,     x,     fgstring,     bgstring   ); 