_col(t_room_sim_0d *x, t_floatarg fcol) {   int col = (int)fcol;   char fgstring[MAXPDSTRING];   char bgstring[MAXPDSTRING];   int i;   t_canvas *canvas = glist_getcanvas(x->x_gui.x_glist);      if (col < 0)   {     i = -0 - col;     x->x_gui.x_