lxc-openmandriva: protect possibly unset variable with quotes in -z check
lxc-openmandriva: protect possibly unset variable with quotes in -z check

Signed-off-by: Michael Adam <dcf2bf3ff8ea93047d51252815aac9756207ea09@samba.org>
Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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