replaced use of PTR_CAST, IS_TYPE, ISA in
    idl, editeng, sc, sd, sw, sfx2, sot, starmath

Change-Id: I4a5bba4fdc4829099618c09b690c83f876a3d653
Reviewed-on: https://gerrit.libreoffice.org/19132Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Oliver Specht <oliver.specht@cib.de>