renamed temporary list in EnhancedCustomShape2d.cxx to avoid shadow
of a local variable

Change-Id: I17a2261dafd2067480fcc5314af4f48765d6b690
Reviewed-on: https://gerrit.libreoffice.org/53244Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jochen Nitschke <j.nitschke+logerrit@ok.de>