Line segment and circular arc detection in C

Recently I've been recommended the algorithm from etemadi's work [1] for line and circular arc detection. The nice and surprising thing was to found a C implementation available which still works (was written in 1993).
I've made some minor corrections to the code to make it compile in a 64 bit platform. You can find the corrected version here: ORT-2.3 accesible from anonymous SVN.
I've tested it on mac osx lion with the following compiler: 
gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.1.00)
Enjoy!

[1] "Robust segmentation of edge data". Etemadi, A. , International Conference on  Image Processing and its Applications. 1992. link