fixes a memory leak when NewReaderIterator creates a nilFloatIterator
fixes a memory leak when NewReaderIterator creates a nilFloatIterator

linearb/influxdb,influxdb/influxdb,vladlopes/influxdb,mark-rushakoff/influxdb,mark-rushakoff/influxdb,vladlopes/influxdb,li-ang/influxdb,benbjohnson/influxdb,linearb/influxdb,benbjohnson/influxdb,influxdata/influxdb,nooproblem/influxdb,chenziliang/influxdb,nooproblem/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,benbjohnson/influxdb,benbjohnson/influxdb,nooproblem/influxdb,chenziliang/influxdb,influxdb/influxdb,vladlopes/influxdb,influxdb/influxdb,mark-rushakoff/influxdb,nooproblem/influxdb,nooproblem/influxdb,li-ang/influxdb,influxdb/influxdb,influxdb/influxdb,chenziliang/influxdb,vladlopes/influxdb,influxdata/influxdb,mark-rushakoff/influxdb,chenziliang/influxdb,linearb/influxdb,linearb/influxdb,mark-rushakoff/influxdb,linearb/influxdb