Fix: ImageViewer with VTK6
Fix: ImageViewer with VTK6

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