redisplay w/o minibuffer broken - 2

Version: 21.4 Window system: X When `make-frame' is called as in `ediff-setup-control-frame' with `nil' value of `minibuffer' property, xemacs may calculate `f->height' incorrectly. With `modeline-shadow-thickness' globally 0 and default face font height 13 one newly created frame may have `f->pixheight' 21 and `f->height' 2. That many characters do not fit in frame pixel height. So either text area or modeline of frame root window is (nearly) invisible. Sometimes it even calculates heights reasonably: pixheight = 34 and height = 2. But echo area in that frame gets displayed and overlaps modeline text.