normalize coefficients of lines for Intersect[conic, line] eg Intersect[ (x - 1.62010081566832)² + (y + 31.674457260881873)² = 0.028900000000021 ,  0.000158120368003x + 0.000144840828995y = -0.004331583710062 ]

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@25580 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e