uxtheme: use proper refcounting for theme files

[Frank Richter]

Opening some theme class data now also increases the reference count of
the theme file, so as long as theme class data is still opened
somewhere, the theme file won't get freed. Otherwise, it could happen
that invalid class data was used, which could lead to problems.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: uxtheme-refcount.diff
Type: text/x-patch
Size: 1421 bytes
Desc: not available
Url : http://www.winehq.org/pipermail/wine-patches/attachments/20050703/a1d9e7c5/uxtheme-refcount.bin