Here is another patch to resolve the issue (to apply after the previous
one, that is already commited to SVN) :
https://sourceforge.net/tracker/index.php?func=detail&aid=1568462&...
I also made a patch to apply to 0.44.1 that correct the 3
clip-mask/boolean bug (boolean + simplify + object2path):
http://popolon.org/inkscape/patchs/fix_mask_clip-path_for_bool-simplify-o...