Italic font does not have same height as non-italic

[Lennart Borgman]

It looks like the height of an italic font is different from a 
non-italic, at least on w32. To show this do the following:

1)  emacs -Q
2)  Paste the code below into the scratch buffer and evaluate it.
3)  Shrink the frame so that it just shows the code.
4)  Now do this several times
  M-x test-i

Watch which lines are shown. With italic on fewer lines are shown.

>>>>>>>>
(defvar test-i-ovl nil)

(defun test-i()
  (interactive)
  (if test-i-ovl
      (progn
        (delete-overlay test-i-ovl)
        (setq test-i-ovl nil))
    (setq test-i-ovl (make-overlay (point-min) (point-max)))
    (overlay-put test-i-ovl
                 'face
                 '(:slant italic
                   ;;:underline t
                   ;;:background "red"
                   )))
  (goto-char (point-min)))
<<<<<<<<<<


In GNU Emacs 22.0.96.1 (i386-mingw-nt5.1.2600)
 of 2007-03-21
Windowing system distributor `Microsoft Corp.', version 5.1.2600
configured using `configure --with-gcc (3.4) --cflags -Ic:/g/include'

Important settings:
  value of $LC_ALL: nil
  value of $LC_COLLATE: nil
  value of $LC_CTYPE: nil
  value of $LC_MESSAGES: nil
  value of $LC_MONETARY: nil
  value of $LC_NUMERIC: nil
  value of $LC_TIME: nil
  value of $LANG: ENU
  locale-coding-system: cp1252
  default-enable-multibyte-characters: t