Convert remaining assert()s to throw khmer_exception()s

Addresses #215 
Correct. Coverity pointed out that seq_idx is unsigned thus rendering the
test moot.
On Aug 2, 2014 5:44 PM, "Camille Scott" <notifications@github.com> wrote:

> In lib/read_aligner.cc:
>
> > @@ -339,8 +339,9 @@ Alignment* ReadAligner::ExtractAlignment(AlignmentNode* node,
> >          return ret;
> >      }
> >
> > -    assert(node->seq_idx < read.length());
> > -    assert(node->seq_idx >= 0);
> > +    if (!(node->seq_idx < read.length())) {
>
> Is the >= 0 assert no longer necessary?
>
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> <https://github.com/ged-lab/khmer/pull/572/files#r15731533>.
>