Do not blow up if the error is that a chain cannot be found
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@ -3,8 +3,8 @@ var nThen = require('nthen');
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var getIndex = function(db, cName, cb) {
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db.get(cName+'=>index', function(e, out){
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if (e) { throw e; }
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cb(parseInt(out));
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if (e && !e.notFound) { throw e; }
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cb(parseInt(out || 0));
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});
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};
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