Meta server: fix return code of Tree::getalloc(fid, offset, chunk_info_vector, max_chunks) in the case when leaf node search returns next file, i.e. no chunks exists after the specified offset.
Meta server: fix return code of Tree::getalloc(fid, offset, chunk_info_vector, max_chunks) in the case when leaf node search returns next file, i.e. no chunks exists after the specified offset.

quantcast/qfs,fengshao0907/qfs,qnu/qfs,qnu/qfs,chanwit/qfs,fengshao0907/qfs,thebigbrain/qfs,chanwit/qfs,qnu/qfs,qnu/qfs,qnu/qfs,thebigbrain/qfs,quantcast/qfs,chanwit/qfs,chanwit/qfs,fengshao0907/qfs,quantcast/qfs,chanwit/qfs,thebigbrain/qfs,thebigbrain/qfs,quantcast/qfs,qnu/qfs,chanwit/qfs,quantcast/qfs,chanwit/qfs,qnu/qfs,fengshao0907/qfs,qnu/qfs,fengshao0907/qfs,fengshao0907/qfs,chanwit/qfs,fengshao0907/qfs,thebigbrain/qfs,quantcast/qfs,thebigbrain/qfs,thebigbrain/qfs,thebigbrain/qfs,quantcast/qfs,fengshao0907/qfs,quantcast/qfs