[-Werror=nonnull-compare] Superfluous null comparison
[-Werror=nonnull-compare] Superfluous null comparison

Errors out on GCC 6.4.1

cmu-db/peloton,cmu-db/peloton,vittvolt/peloton,apavlo/peloton,PauloAmora/peloton,haojin2/peloton,apavlo/peloton,vittvolt/peloton,PauloAmora/peloton,yingjunwu/peloton,cmu-db/peloton,malin1993ml/peloton,seojungmin/peloton,yingjunwu/peloton,apavlo/peloton,PauloAmora/peloton,malin1993ml/peloton,seojungmin/peloton,cmu-db/peloton,haojin2/peloton,apavlo/peloton,cmu-db/peloton,seojungmin/peloton,vittvolt/peloton,apavlo/peloton,vittvolt/peloton,yingjunwu/peloton,haojin2/peloton,yingjunwu/peloton,PauloAmora/peloton,seojungmin/peloton,cmu-db/peloton,seojungmin/peloton,yingjunwu/peloton,malin1993ml/peloton,haojin2/peloton,seojungmin/peloton,vittvolt/peloton,malin1993ml/peloton,haojin2/peloton,apavlo/peloton,PauloAmora/peloton,haojin2/peloton,yingjunwu/peloton,malin1993ml/peloton,vittvolt/peloton,malin1993ml/peloton,PauloAmora/peloton