[AD] [WIN] DirectDraw cleanup patch

["Eric Botcazou" <ebotcazou@xxxxxxxxxx>]

I'm posting this patch for evaluation purpose, since it alters the whole
DirectDraw subsystem.
The patch unifies the initialization process for the three drivers (into
wddmode.c) and cleans up the two windowed drivers.
8 files are touched: wddbmp.c, wddfull.c, wddmode.c, wddovl.c, wddraw.c,
wddraw.h, wddwin.c, wwnd.c and the amount of removed code is about 7.5 ko .

I've extensively tested it (test program, demo program and exupdate
example), both in optimized version and statically linked debug version with
gdb.

Isaac, could you have a look at it ?

--
Eric Botcazou (ebotcazou@xxxxxxxxxx)
Web Site: http://www.multimania.com/ebotcazou

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