Set funckind when processing SLTG functions.

Pass both the start of the block and the offset to the first item into
SLTG_DoVars as they may be different.
Process 0xfffe offsets for variable names - this means to use the
previous name.
Add support for parsing the optional varflags field.

separate function and use it when processing dispinterfaces.

memidDestructor of type infos to the common ITypeInfo creation
function.

Remove the WARN message as this functionality isn't implemented in
native either.

oleaut: Rename SLTG_DoType to SLTG_DoElem and split out the common TYPEDESC generating code to SLTG_DoType.

Process SLTG alias types with SLTG_DoType as the data is stored in the
same format as in other components of the typelib.

common to all elements, so move the processing of these from the
individual element processing.

Improve SLTG alias processing.

either set or not set (reported by Andrey Turkin).