RENDER_WITH_DEFAULT
#define RENDER_WITH_DEFAULT(ch,def) w ## ch = _my_render(win, (ch == 0) ? def : ch)
#define RENDER_WITH_DEFAULT(ch,def) w ## ch = _nc_render(win, (ch == 0) ? def : ch)
#define RENDER_WITH_DEFAULT(ch,def) w ##ch = _nc_render(win, (ch == 0) ? *(const ARG_CH_T)def : *ch)