Fix warnings in 2d/edge.hpp
Fix warnings in 2d/edge.hpp

> edge.hpp:219:28: warning: comparison of integers of different signs: 'int' and 'uint32_t' (aka 'unsigned int') [-Wsign-compare]
> edge.hpp:485:13: warning: unused variable 'height' [-Wunused-variable]
> edge.hpp:486:13: warning: unused variable 'width' [-Wunused-variable]

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