[ublas] resize patch #3

From: Neal Becker (ndbecker2_at_[hidden])
Date: 2007-04-25 09:42:39

This implements fixes to vector_sparse and matrix_sparse to accomodate the
change to storage.

With this patch, all ublas regression tests pass.

Not quite sure if it is optimal.

One thing I had to do is make sure that all sparse resize will zero index
arrays.