window_frozen_p  19759 src/xdisp.c      if ((w->optional_new_start || window_frozen_p (w))
window_frozen_p  19789 src/xdisp.c    		  if (window_frozen_p (w))
window_frozen_p  19813 src/xdisp.c          if (!w->preserve_vscroll_p || !window_frozen_p (w))