Fix warnings in features/esf.hpp
Fix warnings in features/esf.hpp

> esf.hpp:77:9: warning: unused variable 'h_d1' [-Wunused-variable]

KevenRing/pcl,the-glu/pcl,ResByte/pcl,ResByte/pcl,pkuhto/pcl,stfuchs/pcl,DaikiMaekawa/pcl,msalvato/pcl_kinfu_highres,chatchavan/pcl,stefanbuettner/pcl,srbhprajapati/pcl,nh2/pcl,DaikiMaekawa/pcl,nikste/pcl,cascheberg/pcl,KevenRing/vlp,Tabjones/pcl,soulsheng/pcl,MMiknis/pcl,soulsheng/pcl,nh2/pcl,jeppewalther/kinfu_segmentation,krips89/pcl_newfeatures,mikhail-matrosov/pcl,jakobwilm/pcl,MMiknis/pcl,v4hn/pcl,fskuka/pcl,mikhail-matrosov/pcl,stfuchs/pcl,zhangxaochen/pcl,chenxingzhe/pcl,mschoeler/pcl,zhangxaochen/pcl,KevenRing/vlp,Tabjones/pcl,kanster/pcl,shivmalhotra/pcl,wgapl/pcl,damienjadeduff/pcl,closerbibi/pcl,shyamalschandra/pcl,locnx1984/pcl,jakobwilm/pcl,nh2/pcl,RufaelDev/pcc-mp3dg,starius/pcl,shyamalschandra/pcl,fanxiaochen/mypcltest,msalvato/pcl_kinfu_highres,damienjadeduff/pcl,shangwuhencc/pcl,fanxiaochen/mypcltest,Tabjones/pcl,nikste/pcl,krips89/pcl_newfeatures,nikste/pcl,raydtang/pcl,KevenRing/vlp,simonleonard/pcl,lebronzhang/pcl,simonleonard/pcl,mschoeler/pcl,v4hn/pcl,shyamalschandra/pcl,fanxiaochen/mypcltest,shivmalhotra/pcl,Tabjones/pcl,zavataafnan/pcl-truck,starius/pcl,raydtang/pcl,mschoeler/pcl,ResByte/pcl,jeppewalther/kinfu_segmentation,v4hn/pcl,RufaelDev/pcc-mp3dg,shivmalhotra/pcl,jeppewalther/kinfu_segmentation,jeppewalther/kinfu_segmentation,RufaelDev/pcc-mp3dg,wgapl/pcl,the-glu/pcl,raydtang/pcl,fskuka/pcl,soulsheng/pcl,mikhail-matrosov/pcl,lydhr/pcl,starius/pcl,chenxingzhe/pcl,starius/pcl,locnx1984/pcl,msalvato/pcl_kinfu_highres,3dtof/pcl,zavataafnan/pcl-truck,zavataafnan/pcl-truck,chatchavan/pcl,soulsheng/pcl,v4hn/pcl,ipa-rmb/pcl,kanster/pcl,srbhprajapati/pcl,stefanbuettner/pcl,zhangxaochen/pcl,MMiknis/pcl,wgapl/pcl,KevenRing/vlp,zavataafnan/pcl-truck,pkuhto/pcl,Tabjones/pcl,lydhr/pcl,srbhprajapati/pcl,chatchavan/pcl,cascheberg/pcl,srbhprajapati/pcl,shangwuhencc/pcl,stefanbuettner/pcl,drmateo/pcl,zhangxaochen/pcl,the-glu/pcl,KevenRing/pcl,LZRS/pcl,sbec/pcl,the-glu/pcl,v4hn/pcl,shyamalschandra/pcl,stefanbuettner/pcl,chenxingzhe/pcl,shangwuhencc/pcl,drmateo/pcl,3dtof/pcl,ipa-rmb/pcl,srbhprajapati/pcl,msalvato/pcl_kinfu_highres,chenxingzhe/pcl,lebronzhang/pcl,stefanbuettner/pcl,LZRS/pcl,lydhr/pcl,nh2/pcl,jakobwilm/pcl,krips89/pcl_newfeatures,raydtang/pcl,fskuka/pcl,kanster/pcl,cascheberg/pcl,shangwuhencc/pcl,chenxingzhe/pcl,shangwuhencc/pcl,fskuka/pcl,ResByte/pcl,lebronzhang/pcl,closerbibi/pcl,locnx1984/pcl,closerbibi/pcl,raydtang/pcl,KevenRing/pcl,stfuchs/pcl,MMiknis/pcl,ResByte/pcl,lebronzhang/pcl,fanxiaochen/mypcltest,ipa-rmb/pcl,simonleonard/pcl,krips89/pcl_newfeatures,lebronzhang/pcl,pkuhto/pcl,shivmalhotra/pcl,fskuka/pcl,damienjadeduff/pcl,KevenRing/pcl,zavataafnan/pcl-truck,sbec/pcl,jakobwilm/pcl,the-glu/pcl,kanster/pcl,KevenRing/vlp,zhangxaochen/pcl,lydhr/pcl,closerbibi/pcl,DaikiMaekawa/pcl,sbec/pcl,shyamalschandra/pcl,DaikiMaekawa/pcl,nikste/pcl,3dtof/pcl,drmateo/pcl,wgapl/pcl,fanxiaochen/mypcltest,jakobwilm/pcl,drmateo/pcl,RufaelDev/pcc-mp3dg,sbec/pcl,DaikiMaekawa/pcl,damienjadeduff/pcl,RufaelDev/pcc-mp3dg,sbec/pcl,stfuchs/pcl,mikhail-matrosov/pcl,cascheberg/pcl,mschoeler/pcl,simonleonard/pcl,locnx1984/pcl,MMiknis/pcl,cascheberg/pcl,jeppewalther/kinfu_segmentation,LZRS/pcl,wgapl/pcl,starius/pcl,chatchavan/pcl,kanster/pcl,closerbibi/pcl,krips89/pcl_newfeatures,ipa-rmb/pcl,damienjadeduff/pcl,pkuhto/pcl,msalvato/pcl_kinfu_highres,LZRS/pcl,locnx1984/pcl,stfuchs/pcl,ipa-rmb/pcl,soulsheng/pcl,mschoeler/pcl,nikste/pcl,drmateo/pcl,pkuhto/pcl,LZRS/pcl,3dtof/pcl,mikhail-matrosov/pcl,simonleonard/pcl,3dtof/pcl,KevenRing/pcl,lydhr/pcl,shivmalhotra/pcl