From Joachim Pouderoux, "Please find attached a very small fix for the DXF reader. The bug made OSG

crash with some files.
Actually, itr was incremented into the loop and after the test with
nlist.end().
Then, the unreferencing of itr when nlist is equals to nlist.end() caused
the crash."

src/osgPlugins/dxf/dxfEntity.cpp

@@ -594,8 +594,7 @@ dxfPolyline::drawScene(scene* sc)
         double bad_c = 0;
         double good_c = 0;
         long bad=0,good=0;
-        for (; itr != nlist.end(); ) {
-            ++itr;
+        for (; itr != nlist.end(); ++itr) {
             if ((*itr)== lastn) continue;
             Vec3d diff = ((*itr)-lastn);
             diff.normalize();