[Bug 28754] In comdl32/tests/itemdlg.ok, update_layout() uses uninitialized window rect

https://bugs.winehq.org/show_bug.cgi?id=28754

--- Comment #2 from Austin English  ---
 Conditional jump or move depends on uninitialised value(s)
    at  update_layout (itemdlg.c:1118)
    by  IFileDialog2_fnSetFileNameLabel (itemdlg.c:1972)
    by  IFileOpenDialog_fnSetFileNameLabel (shobjidl.h:13997)
    by  test_basics (shobjidl.h:15138)
    by  func_itemdlg (itemdlg.c:1932)
    by  run_test (test.h:584)
    by  main (test.h:654)
  Uninitialised value was created by a stack allocation
    at  update_layout (itemdlg.c:1102)

still present.