Update pcl_pcd2png tool to support painting infinite points with black
Update pcl_pcd2png tool to support painting infinite points with black

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