Before regenerating amg_core_wrap.cxx with SWIG, ensure that you
are using SWIG Version 1.3.34 or newer (check with: 'swig -version')

The wrappers are generated with:
   swig -c++ -python amg_core.i


Try to keep numpy.i and complex_ops.h synchronized with those in SciPy.
http://projects.scipy.org/scipy/scipy/browser/trunk/scipy/sparse/sparsetools
