coverity: Check return value of setenv
coverity: Check return value of setenv

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

ecarrara/lxc,ysbnim/lxc,rowhit/lxc,ojkastl/lxc_Patches,DarknessBeforeDawn/lxc,ysbnim/lxc,caglar10ur/lxc,weizhenwei/lxc,LynxChaus/lxc,ecarrara/lxc,lazy404/lxc,ksperis/lxc,JohnPeacockMessageSystems/lxc,federicobriata/lxc,Distrotech/lxc,terceiro/lxc,DarknessBeforeDawn/lxc,tych0/lxc,Pelagicore/lxc,rldleblanc/lxc,raspberrypython/lxc,bmoar/lxc,bmoar/lxc,fwilson42/lxc,QingweiPeterLan/cs188-lxc,cjwatson/lxc,major/lxc,jirislaby/lxc,raspberrypython/lxc,hkjolhede/lxc,fwilson42/lxc,rowhit/lxc,weizhenwei/lxc,yubo/lxc,bostjan/lxc,ysbnim/lxc,ss1h2a3tw/lxc,JohnPeacockMessageSystems/lxc,ioops/lxc,GreatFruitOmsk/lxc,armcc/lxc,lisongmin/lxc,efiop/lxc,QingweiPeterLan/cs188-lxc,bostjan/lxc,hfuCN/lxc,Ponce/lxc,rldleblanc/lxc,thmo/lxc,ss1h2a3tw/lxc,ioops/lxc,yubo/lxc,akshaykarle/lxc,jirislaby/lxc,sapun/lxc,ioops/lxc,cjwatson/lxc,codebauss/lxc,codebauss/lxc,yubo/lxc,Ponce/lxc,tych0/lxc,ojkastl/lxc_Patches,virajs/lxc,szaszg/lxc,federicobriata/lxc,armcc/lxc,regit/lxc,cjwatson/lxc,ksperis/lxc,federicobriata/lxc,weizhenwei/lxc,efiop/lxc,Distrotech/lxc,sapun/lxc,szaszg/lxc,lazy404/lxc,aeris/lxc,hfuCN/lxc,LynxChaus/lxc,hkjolhede/lxc,jirislaby/lxc,bmoar/lxc,Distrotech/lxc,lisongmin/lxc,christiaan/lxc,ojkastl/lxc_Patches,hallyn/lxc,christiaan/lxc,fwilson42/lxc,tych0/lxc,Ponce/lxc,GreatFruitOmsk/lxc,regit/lxc,JohnPeacockMessageSystems/lxc,ojkastl/lxc_Patches,terceiro/lxc,LynxChaus/lxc,major/lxc,ksperis/lxc,regit/lxc,bostjan/lxc,caglar10ur/lxc,sapun/lxc,christiaan/lxc,major/lxc,rldleblanc/lxc,szaszg/lxc,lazy404/lxc,hallyn/lxc,hfuCN/lxc,aeris/lxc,ecarrara/lxc,DarknessBeforeDawn/lxc,rowhit/lxc,Pelagicore/lxc,terceiro/lxc,ss1h2a3tw/lxc,thmo/lxc,akshaykarle/lxc,virajs/lxc,QingweiPeterLan/cs188-lxc,caglar10ur/lxc,raspberrypython/lxc,hkjolhede/lxc,GreatFruitOmsk/lxc,Pelagicore/lxc,hallyn/lxc,codebauss/lxc,armcc/lxc,lisongmin/lxc,aeris/lxc,akshaykarle/lxc,efiop/lxc,thmo/lxc,virajs/lxc