Apparently matrices in gdiplus don't work the way I think they do.

This will make it possible to use the same codepath for non-bitmap graphics
objects and to create a software implementation for other drawing operations.

604caf0c supposedly removed the "oversized
texture" code, but this was still left over.

wine.inf: Register iexplore from the system directory so that the 32-bit version gets registered too.

This code was needed when the destination uses 8-bit and the source lacked a palette.
Since we don't allow destination fixups, this code doesn't do anything. At a later
stage something like this should perhaps be readded to specific backends.