Fix a bug where the returned number of bigrams was incorrect

        // codesSize == 0 means we are trying to find bigram predictions.

        if (codesSize < 1 || checkFirstCharacter(bigramBuffer)) {

            const int frequency = UnigramDictionary::MASK_ATTRIBUTE_FREQUENCY & bigramFlags;

            addWordBigram(bigramBuffer, length, frequency);

        }

            if (addWordBigram(bigramBuffer, length, frequency)) {

                ++bigramCount;

            }

        }

    } while (0 != (UnigramDictionary::FLAG_ATTRIBUTE_HAS_NEXT & bigramFlags));

    return bigramCount;

}