fix error in PFH tutorial
fix error in PFH tutorial

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