lpColumnInfo->fmt & LVCFMT_IMAGE is supposed to mean that header item has
an image. It is not supposed to mean that all items in that column
should reserve space for an icon if they don't have any.

dwTextureBlendCaps is overwritten later, and (potentially) uninitialized here.

All remaining uses are equivalent to "device->up_strided". (Which should of
course eventually go away as well.)

Strided draws don't use VBOs.

device_stream_info_from_declaration() no longer cares about
state->user_stream.

Since user pointer draws were removed, state->user_stream will only ever be
set for "strided" draws, and device_stream_info_from_declaration() is never
called for those.