Change find_fstype_cb to ignore blank lines and comments
Change find_fstype_cb to ignore blank lines and comments

/etc/filesystems could be contain blank lines and comments.
Change find_fstype_cb() to ignore blank lines and comments which starts
with '#'.

Signed-off-by: Yuto KAWAMURA(kawamuray) <12589a13a27e6c6eeb0b2b8963a6f3e92691a9e2@gmail.com>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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