bug#19200: Point adjustemnt moves *into* invisible text

[Stefan Monnier]

1. Yank this in an empty buffer in fundamental-mode and evaluate it.

(progn
  (goto-char (point-min))
  (insert "1\n"
          (propertize "3\n" 'invisible t)
          "5\n"
          "7\n")
          (backward-char 2))

2. M-< C-n

3. M-: (point) RET

  This should say 3 (where get-pos-property says it's not invisible)
  but returns 5 (where get-pos-property says it is invisible)!

4. M-: (point) RET

  This now returns 3.


-- Stefan