This function will scan through the packTable, and for each TagItem
described in a packTable entry which can be found in the tagList,
the data in the TagItem's ti_Data field will be packed into the
structure as described in the packTable.
INPUTS
pack
The structure to fill in.
packTable
Table describing how to pack the structure.
See the include file utility/pack.h for
information on the format of this table.