Some fields should be redundant now, eg. gl_vtx_type and glType. I'll leave
that for a different patch to fix though.

Wined3d doesn't need it since it already has the element count.

wined3d: Separate the internal representation of vertex declaration elements from the struct used to create it.

Internally we want to store some extra data, like ffp_valid. One of the later
patches also stores the format desc in the declaration elements, instead of
the current WINED3DDECLTYPE.

It's never used.

rpcrt4: Ensure that only the IP/IPv6 address families are considered in rpcrt4_protseq_ncacn_ip_tcp_open_endpoint/rpcrt4_ncacn_ip_tcp_open.

Return RPC_S_INVALID_ENDPOINT_FORMAT if a NULL endpoint is passed into
RpcServerUseProtseqEp{,Ex}{A,W}.

It doesn't really matter if lighting is enabled or not if we don't have
position data.

These are essentially unused, and mostly just complicate the code.