fix stripEmptyTextNodes for IE (part of #615337)
this does not seem to make the function really work but it does not fail any more
# -*- shell-script -*-
###############################################################################
#
# put here information about external resources used by your components,
# or to overides existing external resources configuration
#
###############################################################################
# CSS stylesheets to include in HTML headers
# uncomment the line below to use template specific stylesheet
# STYLESHEETS = DATADIR/cubes.%(cubename)s.css