bug in spline_path

[Mark Danks]

Patrick Rost found a bug in the spline_path object (actually a
crasher).  This is on all platforms.  Basically, if the input to
spline_path is >= 1.0, then there is some seriously undefined behavior
which wanders around memory (there is an error in my knot logic).

  I hope to have a fix for this in the next day or so.  Until then, just
clamp the max input value to .99 or something.

Later, Mark

-- 
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-           Mark Danks             -
-       mdanks at xaostools.com       -
-  http://cybermed.ucsd.edu/mdanks -
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