Remove useless var and check in zunionInterGenericCommand().
Remove useless var and check in zunionInterGenericCommand().

janeasystems/redis,Cybermaxs/redis,nandhanurrevanth/redis,enginekit/redis,sidsen/redis,enginekit/redis,quangnguyen90/redis,fanxu/redis,damy/redis,liqiang199105/redis,ScottKaiGu/redis,erwin00776/redis-2.8-optimize,kts12345/redis,liqiang199105/redis,Jonavin/redis,enginekit/redis,kolonse/redis,sidsen/redis,kts12345/redis,LittlePeng/redis,laurencee/redis,jqk6/redis,jqk6/redis,adamweixuan/redis,jaambee/redis,laurencee/redis,kolonse/redis,jqk6/redis,kolonse/redis,hanmichael/redis,upsoft/redis,Cybermaxs/redis,jaambee/redis,LittlePeng/redis,liqiang199105/redis,janeasystems/redis,ideaar/redis,jaambee/redis,ScottKaiGu/redis,laurencee/redis,StartTheShift/redis-shift,miminus/redis,alpha8/redis,janeasystems/redis,jqk6/redis,enginekit/redis,sidsen/redis,alpha8/redis,quangnguyen90/redis,shanegxxiao/redis,nandhanurrevanth/redis,damy/redis,damy/redis,adamweixuan/redis,quangnguyen90/redis,sidsen/redis,ScottKaiGu/redis,upsoft/redis,fanxu/redis,janeasystems/redis,miminus/redis,kolonse/redis,shanegxxiao/redis,fanxu/redis,adamweixuan/redis,jacklee0810/redis,janeasystems/redis,shanegxxiao/redis,damy/redis,erwin00776/redis-2.8-optimize,ideaar/redis,nandhanurrevanth/redis,LittlePeng/redis,Cybermaxs/redis,Cybermaxs/redis,kts12345/redis,shanegxxiao/redis,kolonse/redis,Jonavin/redis,Jonavin/redis,hanmichael/redis,StartTheShift/redis-shift,ideaar/redis,laurencee/redis,nandhanurrevanth/redis,jaambee/redis,damy/redis,kts12345/redis,enginekit/redis,miminus/redis,jacklee0810/redis,alpha8/redis,alpha8/redis,jacklee0810/redis,Jonavin/redis,ideaar/redis,upsoft/redis,fanxu/redis,alpha8/redis,hanmichael/redis,jacklee0810/redis,miminus/redis,quangnguyen90/redis,StartTheShift/redis-shift,sidsen/redis,hanmichael/redis,upsoft/redis,erwin00776/redis-2.8-optimize,adamweixuan/redis,kts12345/redis,jqk6/redis,jaambee/redis,liqiang199105/redis,liqiang199105/redis,Cybermaxs/redis,shanegxxiao/redis,hanmichael/redis,ScottKaiGu/redis,upsoft/redis,miminus/redis,nandhanurrevanth/redis,erwin00776/redis-2.8-optimize,Jonavin/redis,adamweixuan/redis,jacklee0810/redis,quangnguyen90/redis,ideaar/redis,laurencee/redis,sidsen/redis,ScottKaiGu/redis