NAME
    CloseIFF -- Close an IFF context.
SYNOPSIS
    CloseIFF (iff)
              a0
    struct iffhandle *iff;
FUNCTION
    Completes an IFF read or write operation by closing the IFF context
    established for this iffhandle struct.  the iffhandle struct itself
    is left ready for re-use and a new context can be opened with
    openiff().  this function can be used for cleanup if a read or write
    fails partway through.
    As part of its cleanup operation, CloseIFF() calls the client-
    supplied stream hook vector.  The iffstreamcmd packet will be set
    as follows:
            sc_Command:     IFFCMD_CLEANUP
            sc_Buf:         (Not applicable)
            sc_NBytes:      (Not applicable)
    This operation is NOT permitted to fail;  any error code returned
    will be ignored (best to return 0, though).  DO NOT write to this
    structure.
INPUTS
    iff     - pointer to iffhandle struct previously opened with
              openiff().
RESULT
EXAMPLE
NOTES
BUGS
SEE ALSO
    openiff(), initiff()