coverity: ftell returns long, not size_t (which is unsigned)
coverity: ftell returns long, not size_t (which is unsigned)

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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