Grzegorz Kowal 50b44c814e Use eps instead of 0.0 in determining local extrema.
- it seems that when we compare side derivatives for interpolated
   states to zero, there are some problems with symmetry; using a small
   value 'eps' instead of 0.0 solves this problem;
2011-04-26 20:54:02 -03:00
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