Fix a bug of SearchManager(bugzilla issue 217 https://ssl.izenesoft.cn/bug/show_bug.cgi?id=217) In ORDocIterator, when there are multiple index barrels, if some barrels are totally empty, we should remove cooresponding TermDocIterator for that barrel from the vector container of all TermDocIterators within ORDocIterator
Fix a bug of SearchManager(bugzilla issue 217 https://ssl.izenesoft.cn/bug/show_bug.cgi?id=217)
In ORDocIterator, when there are multiple index barrels, if some barrels are totally empty,
we should remove cooresponding TermDocIterator for that barrel from the vector container of
all TermDocIterators within ORDocIterator

pombredanne/sf1r-lite,izenecloud/sf1r-lite,pombredanne/sf1r-lite,izenecloud/sf1r-ad-delivery,pombredanne/sf1r-lite,pombredanne/sf1r-lite,pombredanne/sf1r-lite,izenecloud/sf1r-ad-delivery,izenecloud/sf1r-lite,izenecloud/sf1r-lite,izenecloud/sf1r-ad-delivery,izenecloud/sf1r-ad-delivery,izenecloud/sf1r-lite,izenecloud/sf1r-lite,izenecloud/sf1r-ad-delivery