Reflect to fix bug that InitUnigramTable()
Reflect to fix bug that InitUnigramTable()

see https://code.google.com/p/word2vec/source/diff?spec=svn42&r=42&format=side&path=/trunk/word2vec.c&old_path=/trunk/word2vec.c&old=39

naoa/groonga-word2vec,naoa/groonga-word2vec,naoa/groonga-word2vec