fix for bug #24

[Michael Stefaniuc]

Hello,

at least the attached patch fixes the problem described in the summary
of bug #24 (in the description there are some other problems described
too. That's why i CC wine-devel to let one of the bugzilla guru's decide
how to proceed with that bug report).
ImageList_Remove when called to remove all images on an empty ImageList
returns TRUE. Checked with the ControlSpy on Windows 98SE (MSDN wasn't
helpfull in this case).

Changelog:
    - Michael Stefaniuc  
      ImageList_Remove returns TRUE when removing all images of an
      empty ImageList

bye
    michael