comctl32: Rename the dwStyle and dwOldStyle variables in LISTVIEW_SetExtendedListViewStyle to more accurately reflect their purpose.

This also fixes local variable shadowing in the function, which should 
be avoided for purposes of code readability.

comctl32: Fix local variable shadowing in load_string by moving len to the block in which it is actually used.

shdocvw: The default value for the "CLSID\%CLSID_Internet" key isn't set on Windows, so we shouldn't set it either.

wined3d: In DirectDraw a palette is a property of a surface while in d3d8/9 it is a property of a device.

Sync the application's bits in SetDIBits if the input bits are in 
exactly the same format and the size of the image is small enough not to 
cause a performance hit (in case the application doesn't get ever access 
the bits directly).

gdi32: Optimise StretchBlt for the case where no stretching is being done and the whole image is being set.

In this case, we can just call SetDIBits which is likely to be a lot faster.