add guardians around gcc pragma
add guardians around gcc pragma

git-svn-id: 5398946ba177a3e438c2dae55e2cdfc2fb96c905@4950 a9d63959-f2ad-4865-b262-bf0e56cfafb6

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