neq0_conv removed from [iff] -- causes problems by simple goals with blast, auto etc...
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%% $Id$
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%% smart url or hyperref setup
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\newif\ifpdfoutput
\ifx\pdfoutput\undefined
\else
\ifx\pdfoutput\relax
\else
\ifcase\pdfoutput
\else\pdfoutputtrue\fi
\fi
\fi
\ifpdfoutput
\message{PDF output}
\usepackage{color}\definecolor{darkblue}{rgb}{0,0,0.5}
\usepackage[pdftex,a4paper,colorlinks=true,linkcolor=darkblue,citecolor=darkblue,filecolor=darkblue,pagecolor=darkblue,urlcolor=darkblue]{hyperref}
\IfFileExists{thumbpdf.sty}{\usepackage{thumbpdf}}{}
\else
\message{No PDF output}
\usepackage{url}
\fi