This should avoid some extra work on platforms that need the
try_mmap_fixed function.

Screwed up a copy/paste from one of my recent patches.  This
eliminates the erroneous FIXME for calls to D3DFmtMakeGlCfg() with 0
as the Stencil format.  Also, it changes the FIXME to print the
correct variable.

Joined the functions as it looks like a typo in the function name
(IWineD3DDeviceImpl_Rest isn't used anywhere but contains comments).

Add an executable page at the top of the address space to defeat
broken no-exec protections that play with the code selector limit.

Draw a track line after a HDN_TRACK, resize the columns only after a
HDN_ITEMCHANGED.
Create the header with HDS_FULLDRAG.

Fix the HDS_FULLDRAG headers notifications, invalidate such a control
after a mouse move.