fixed compiler warnings in filter.h
fixed compiler warnings in filter.h


git-svn-id: 5398946ba177a3e438c2dae55e2cdfc2fb96c905@861 a9d63959-f2ad-4865-b262-bf0e56cfafb6

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