fix go vet warning
fix go vet warning

orivej/packer,KohlsTechnology/packer,danschaffer/packer,tsmolka/packer,tb3088/packer,napramirez/packer,p1-nico/packer,mafrosis/packer,tas50/packer,pieter-lazzaro/packer,rnaveiras/packer,sansb/packer,dev-head/packer,LinusU/packer,leroux/packer,jmptrader/packer,rodm/packer,Akasurde/packer,mansunkuo/packer,threatstream/packer,tb3088/packer,manicai/packer,jamesbishopp/packer,Cbeck527/packer,paulvollmer/packer,boumenot/packer,c22/packer,sean-/packer,arizvisa/packer,dieu/packer,lantrix/packer,tomwilkie/packer,tb3088/packer,mgk/packer,rrva/packer,yoctocloud/packer,ricardclau/packer,taliesins/packer,Cbeck527/packer,jonathankarsh/packer,justincampbell/packer,boumenot/packer,esemplare/packer,ephemeralsnow/packer,jen20/packer,mwhooker/packer,icnocop/packer,gildas/packer-hyperv,jae2/packer,p1-nico/packer,markpeek/packer,avldya/packer,tas50/packer,evertrue/packer,jae2/packer,hazelesque/packer,higebu/packer,dantran/packer,styro/packer,zakuro9715/packer,eranchetz/packer,hazelesque/packer,c22/packer,pecigonzalo/packer,hazelesque/packer,burnzy/packer,pvanbuijtene/packer,noplay/packer,masbog/packer,c22/packer,aneeshusa/packer,justincampbell/packer,marklap/packer,jsternberg/packer,atlassian/packer,mefellows/packer,leroux/packer,AlphaStaxLLC/packer,beni55/packer,marklap/packer,sansb/packer,mohae/packer,quantang/packer,pvandervelde/packer,ephemeralsnow/packer,marklap/packer,jean/packer,legal90/packer,pearkes/packer,dieu/packer,paulvollmer/packer,styro/packer,hasJackb/packer,danschaffer/packer,visioncritical/packer,threatstream/packer,marc-ta/packer,monkeylittleinc/packer,israelshirk/packer,jimmythedog/packer,tas50/packer,sneal/packer,tb3088/packer,zhuzhih2017/packer,LinusU/packer,hashicorp/packer,life360/packer,atlassian/packer,Xiol/packer,burnzy/packer,ttaylor249/packer,rickard-von-essen/packer,bhcleek/packer,pearkes/packer,AlphaStaxLLC/packer,kpettijohn/packer,fnoeding/packer,mkuzmin/packer,mitchellh/packer,zakuro9715/packer,ttaylor249/packer,KohlsTechnology/packer,bensojona/packer,sneal/packer,youhong316/packer,monkeylittleinc/packer,stagrlee/packer,monsterzz/packer,dantran/packer,zeliff/packer,KFishner/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,orivej/packer,napramirez/packer,aneeshusa/packer,mwhooker/packer,tsmolka/packer,monkeylittleinc/packer,grubernaut/packer,tomwilkie/packer,dayglojesus/packer,noplay/packer,p1-nico/packer,stagrlee/packer,mansunkuo/packer,sequenceiq/packer,dave2/packer,jean/packer,timsutton/packer,avldya/packer,mansunkuo/packer,quantang/packer,blairham/packer,pvandervelde/packer,ricardclau/packer,eranchetz/packer,mayflower/packer,mwhooker/packer,grange74/packer,jen20/packer,icnocop/packer,jasonchaffee/packer,zeliff/packer,jmptrader/packer,smaato/packer,smaato/packer,threatstream/packer,legal90/packer,boumenot/packer,yonglehou/packer,bryson/packer,kgrvamsi/packer,leroux/packer,lantrix/packer,mgk/packer,mvanholsteijn/packer,life360/packer,routelastresort/packer,markpeek/packer,KFishner/packer,jgkim/packer,styro/packer,ChrisLundquist/packer,Xiol/packer,kgrvamsi/packer,mayflower/packer,rnaveiras/packer,hasJackb/packer,jonathankarsh/packer,ttaylor249/packer,threatstream/packer,tsmolka/packer,manicai/packer,KFishner/packer,sansb/packer,sean-/packer,fnoeding/packer,mkuzmin/packer,pieter-lazzaro/packer,pecigonzalo/packer,vtolstov/packer,Sheile/packer,jen20/packer,jen20/packer,sgirones/packer,ldejager/packer,paulmey/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,pearkes/packer,Akasurde/packer,samdunne/packer,BayanGroup/packer,jamesleech/packer,bhcleek/packer,dantran/packer,bryson/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,jasonchaffee/packer,dave2/packer,pearkes/packer,fnoeding/packer,arizvisa/packer,jimmythedog/packer,gbarberi/packer,dieu/packer,gbarberi/packer,quantang/packer,tsmolka/packer,tb3088/packer,pieter-lazzaro/packer,timsutton/packer,ChrisLundquist/packer,jamesbishopp/packer,kgrvamsi/packer,ldejager/packer,feateds/packer,Akasurde/packer,kpettijohn/packer,mvanholsteijn/packer,p1-nico/packer,smaato/packer,mkuzmin/packer,KohlsTechnology/packer,ldejager/packer,zhuzhih2017/packer,blairham/packer,hazelesque/packer,bryson/packer,manicai/packer,dave2/packer,dayglojesus/packer,rnaveiras/packer,DualSpark/packer,kgrvamsi/packer,jarl-dk/packer,jamesleech/packer,life360/packer,BayanGroup/packer,LinusU/packer,jarl-dk/packer,taliesins/packer,bhcleek/packer,paulmey/packer,paulvollmer/packer,israelshirk/packer,KFishner/packer,kpettijohn/packer,blairham/packer,youhong316/packer,rrva/packer,gbarberi/packer,samdunne/packer,sequenceiq/packer,routelastresort/packer,mohae/packer,visioncritical/packer,timsutton/packer,beni55/packer,tas50/packer,grange74/packer,beni55/packer,ephemeralsnow/packer,jgkim/packer,jamesleech/packer,styro/packer,Silver90/packer,trumant/packer,dev-head/packer,mkuzmin/packer,esemplare/packer,rodm/packer,rrva/packer,aneeshusa/packer,hashicorp/packer,noplay/packer,evertrue/packer,bryson/packer,c22/packer,mefellows/packer,sneal/packer,mohae/packer,pvanbuijtene/packer,pecigonzalo/packer,mohae/packer,tb3088/packer,taliesins/packer,ttaylor249/packer,mitchellh/packer,jae2/packer,dave2/packer,bensojona/packer,visioncritical/packer,higebu/packer,pvandervelde/packer,higebu/packer,zakuro9715/packer,hashicorp/packer,rk295/packer,routelastresort/packer,mwhooker/packer,Akasurde/packer,napramirez/packer,DualSpark/packer,atlassian/packer,grubernaut/packer,mefellows/packer,paulmey/packer,youhong316/packer,bhcleek/packer,jen20/packer,yoctocloud/packer,ChrisLundquist/packer,jasonchaffee/packer,orivej/packer,timsutton/packer,monsterzz/packer,atlassian/packer,pvandervelde/packer,AlphaStaxLLC/packer,arizvisa/packer,mkuzmin/packer,yoctocloud/packer,higebu/packer,sgirones/packer,mafrosis/packer,Xiol/packer,manicai/packer,sean-/packer,samdunne/packer,esemplare/packer,avldya/packer,yonglehou/packer,p1-nico/packer,grange74/packer,boumenot/packer,c22/packer,evertrue/packer,jmptrader/packer,jasonchaffee/packer,rickard-von-essen/packer,tsmolka/packer,rnaveiras/packer,mitchellh/packer,youhong316/packer,taliesins/packer,rk295/packer,higebu/packer,marc-ta/packer,bryson/packer,legal90/packer,oliviertremblay/packer,trumant/packer,orivej/packer,jsternberg/packer,Sheile/packer,Silver90/packer,beni55/packer,smaato/packer,pecigonzalo/packer,stagrlee/packer,samdunne/packer,paulmey/packer,danschaffer/packer,justincampbell/packer,taliesins/packer,grubernaut/packer,grange74/packer,btd/packer,marc-ta/packer,bensojona/packer,taliesins/packer,smaato/packer,mkuzmin/packer,pieter-lazzaro/packer,atlassian/packer,masbog/packer,feateds/packer,btd/packer,avldya/packer,mvanholsteijn/packer,bensojona/packer,mafrosis/packer,sequenceiq/packer,fnoeding/packer,esemplare/packer,leroux/packer,rrva/packer,jonathankarsh/packer,jonathankarsh/packer,p1-nico/packer,zhuzhih2017/packer,icnocop/packer,sean-/packer,ldejager/packer,dev-head/packer,ChrisLundquist/packer,sneal/packer,rk295/packer,tsmolka/packer,pvandervelde/packer,tas50/packer,jgkim/packer,marc-ta/packer,jae2/packer,bhcleek/packer,btd/packer,jean/packer,jarl-dk/packer,arizvisa/packer,AlphaStaxLLC/packer,hasJackb/packer,pvanbuijtene/packer,mayflower/packer,napramirez/packer,eranchetz/packer,yoctocloud/packer,sobrinho/packer,Sheile/packer,zeliff/packer,arizvisa/packer,jgkim/packer,btd/packer,c22/packer,LinusU/packer,timsutton/packer,grubernaut/packer,sobrinho/packer,paulvollmer/packer,lantrix/packer,DualSpark/packer,noplay/packer,rickard-von-essen/packer,jimmythedog/packer,markpeek/packer,legal90/packer,lantrix/packer,vtolstov/packer,markpeek/packer,sgirones/packer,paulmey/packer,jsternberg/packer,quantang/packer,pvandervelde/packer,BayanGroup/packer,danschaffer/packer,Cbeck527/packer,blairham/packer,ricardclau/packer,israelshirk/packer,evertrue/packer,icnocop/packer,gbarberi/packer,quantang/packer,dave2/packer,mgk/packer,ttaylor249/packer,Silver90/packer,mitchellh/packer,tas50/packer,jasonchaffee/packer,rk295/packer,yoctocloud/packer,zhuzhih2017/packer,ChrisLundquist/packer,dantran/packer,oliviertremblay/packer,routelastresort/packer,jmptrader/packer,dieu/packer,masbog/packer,jean/packer,pieter-lazzaro/packer,sneal/packer,grubernaut/packer,gildas/packer-hyperv,youhong316/packer,aneeshusa/packer,tomwilkie/packer,KohlsTechnology/packer,Akasurde/packer,ricardclau/packer,sgirones/packer,sean-/packer,jamesleech/packer,kpettijohn/packer,hasJackb/packer,jamesbishopp/packer,hashicorp/packer,gildas/packer-hyperv,visioncritical/packer,icnocop/packer,youhong316/packer,atlassian/packer,rodm/packer,esemplare/packer,grange74/packer,ricardclau/packer,burnzy/packer,stagrlee/packer,Cbeck527/packer,mvanholsteijn/packer,Silver90/packer,Xiol/packer,monsterzz/packer,ephemeralsnow/packer,sansb/packer,jimmythedog/packer,jarl-dk/packer,samdunne/packer,feateds/packer,dantran/packer,tomwilkie/packer,DualSpark/packer,bryson/packer,KohlsTechnology/packer,pieter-lazzaro/packer,arizvisa/packer,jsternberg/packer,mansunkuo/packer,monsterzz/packer,trumant/packer,eranchetz/packer,vtolstov/packer,monkeylittleinc/packer,vtolstov/packer,mitchellh/packer,pvanbuijtene/packer,mayflower/packer,mafrosis/packer,oliviertremblay/packer,ChrisLundquist/packer,dayglojesus/packer,dayglojesus/packer,dayglojesus/packer,mansunkuo/packer,life360/packer,markpeek/packer,dave2/packer,sequenceiq/packer,sean-/packer,paulmey/packer,mohae/packer,oliviertremblay/packer,routelastresort/packer,zakuro9715/packer,BayanGroup/packer,boumenot/packer,vtolstov/packer,legal90/packer,monkeylittleinc/packer,justincampbell/packer,marklap/packer,KohlsTechnology/packer,zhuzhih2017/packer,jimmythedog/packer,ephemeralsnow/packer,grubernaut/packer,yonglehou/packer,pvanbuijtene/packer,yonglehou/packer,zhuzhih2017/packer,sobrinho/packer,israelshirk/packer,trumant/packer,jamesbishopp/packer,burnzy/packer,mwhooker/packer,mayflower/packer,masbog/packer,sobrinho/packer,danschaffer/packer,feateds/packer,dev-head/packer,rickard-von-essen/packer,zeliff/packer,jen20/packer,gildas/packer-hyperv,rnaveiras/packer,timsutton/packer,rickard-von-essen/packer,life360/packer,mafrosis/packer,rnaveiras/packer,smaato/packer,mefellows/packer,threatstream/packer,ricardclau/packer,mgk/packer,markpeek/packer,rodm/packer,Sheile/packer,bradparks/packer__create_vm_for_aws_docker_vagrant_etc,Cbeck527/packer