xpdf code is not prepared for paths with only 1 point, skip paths that have only one point, have to check in pdf spec if paths can have 1 point (in that case should fix the fix :-) or that pdf are buggy and the fix is correct in all senses. Pages that crash are 18, 20 and 26 on Introduction_to_Jitter.pdf and page 1 on FT-857.pdf
BUG: 97131

svn path=/trunk/kdegraphics/kpdf/; revision=379020