small API change to FieldInfos before 2.2 is released

Hi, I have a small API change that I've added in my patch for LUCENE-843. It just changes two add methods in FieldInfos to return the FieldInfo instance for the added field, instead of void. One of the methods is private, so that should be fine. The other one is public, but, was added after 2.1

Re: small API change to FieldInfos before 2.2 is released

Michael McCandless wrote: Hi, I have a small API change that I've added in my patch for LUCENE-843. It just changes two add methods in FieldInfos to return the FieldInfo instance for the added field, instead of void. One of the methods is private, so that should be fine. The other one is