...from the changes to xmloff/source/draw/shapeexport2.cxx of
f15874d8 "i123433 Detect pseudo-vertices at svg
import, unify svg:d handling, correct svg:d import for relative sub-polygons in
svg import [...]," given how other changes in that file that introduce
aPolygonString use it.  Found by -Werror,-Wunused-variable.

Change-Id: I915b53ed74e03f84f240f1fa1f17768148f030d6