lcsim/src/org/lcsim/recon/tracking/seedtracker

diff -u -r1.8 -r1.9
--- SeedCandidate.java	4 Sep 2009 23:17:01 -0000	1.8
+++ SeedCandidate.java	4 Sep 2009 23:26:05 -0000	1.9
@@ -87,7 +87,8 @@

         _hits.addAll(seed.getHits());
         _helix = seed.getHelix();
         _msmap.putAll(seed.getMSMap());

-        _scatters = new ArrayList<ScatterAngle>(seed.getScatterAngles());

+        List<ScatterAngle> oldscat = seed.getScatterAngles();
+        if (oldscat != null) _scatters = new ArrayList<ScatterAngle>(oldscat);

         setUncheckedLayers(seed.getUncheckedLayers());
         _mcpset.addAll(seed.getMCParticles());
     }