window_frozen_p  19957 src/xdisp.c      if ((w->optional_new_start || window_frozen_p (w))
window_frozen_p  19987 src/xdisp.c    		  if (window_frozen_p (w))
window_frozen_p  20011 src/xdisp.c          if (!w->preserve_vscroll_p || !window_frozen_p (w))