indexer stat is not accurate

num_docs_pending does not look right for beer-sample.

{"beer-sample:name2:delete_bytes":"0”, "beer-sample:name2:disk_size":"3002368”, "beer-sample:name2:get_bytes":"0”, "beer-sample:name2:insert_bytes":"1142476”, "beer-sample:name2:items_count":"7303”, "beer-sample:name2:num_docs_indexed":"7303”, "beer-sample:name2:num_docs_pending":"18446744073709548416”, "beer-sample:name2:num_docs_queued":"0”, "beer-sample:name2:num_requests":"0”, "beer-sample:name2:num_rows_returned":"0”, "beer-sample:name2:scan_bytes_read":"0”, "beer-sample:name2:scan_wait_duration":"0”, ”beer-sample:name2:total_scan_duration":”0”}