applications/luci-vnstat: fix crash if database dir does not exist
applications/luci-vnstat: fix crash if database dir does not exist


openwrt/luci,marcel-sch/luci,RedSnake64/openwrt-luci-packages,RuiChen1113/luci,dwmw2/luci,mumuqz/luci,aircross/OpenWrt-Firefly-LuCI,nmav/luci,kuoruan/luci,LuttyYang/luci,lbthomsen/openwrt-luci,shangjiyu/luci-with-extra,db260179/openwrt-bpi-r1-luci,lbthomsen/openwrt-luci,Noltari/luci,LuttyYang/luci,ff94315/luci-1,openwrt-es/openwrt-luci,david-xiao/luci,harveyhu2012/luci,daofeng2015/luci,mumuqz/luci,bright-things/ionic-luci,openwrt/luci,dismantl/luci-0.12,bright-things/ionic-luci,remakeelectric/luci,dwmw2/luci,lcf258/openwrtcn,hnyman/luci,kuoruan/lede-luci,zhaoxx063/luci,aircross/OpenWrt-Firefly-LuCI,palmettos/test,keyidadi/luci,urueedi/luci,nmav/luci,joaofvieira/luci,florian-shellfire/luci,urueedi/luci,kuoruan/lede-luci,keyidadi/luci,981213/luci-1,maxrio/luci981213,oyido/luci,aa65535/luci,oneru/luci,marcel-sch/luci,Kyklas/luci-proto-hso,forward619/luci,MinFu/luci,zhaoxx063/luci,ReclaimYourPrivacy/cloak-luci,kuoruan/luci,oneru/luci,dismantl/luci-0.12,slayerrensky/luci,fkooman/luci,deepak78/new-luci,kuoruan/lede-luci,ReclaimYourPrivacy/cloak-luci,lbthomsen/openwrt-luci,MinFu/luci,palmettos/test,opentechinstitute/luci,Kyklas/luci-proto-hso,ollie27/openwrt_luci,palmettos/test,wongsyrone/luci-1,schidler/ionic-luci,ollie27/openwrt_luci,florian-shellfire/luci,Sakura-Winkey/LuCI,opentechinstitute/luci,teslamint/luci,rogerpueyo/luci,Hostle/luci,chris5560/openwrt-luci,maxrio/luci981213,male-puppies/luci,deepak78/new-luci,cappiewu/luci,ReclaimYourPrivacy/cloak-luci,RuiChen1113/luci,palmettos/cnLuCI,jchuang1977/luci-1,slayerrensky/luci,db260179/openwrt-bpi-r1-luci,teslamint/luci,joaofvieira/luci,thesabbir/luci,ollie27/openwrt_luci,shangjiyu/luci-with-extra,cshore/luci,wongsyrone/luci-1,fkooman/luci,MinFu/luci,lcf258/openwrtcn,NeoRaider/luci,maxrio/luci981213,lcf258/openwrtcn,Hostle/luci,oyido/luci,jorgifumi/luci,RedSnake64/openwrt-luci-packages,oneru/luci,lbthomsen/openwrt-luci,MinFu/luci,forward619/luci,wongsyrone/luci-1,bittorf/luci,forward619/luci,wongsyrone/luci-1,nwf/openwrt-luci,thess/OpenWrt-luci,LazyZhu/openwrt-luci-trunk-mod,MinFu/luci,urueedi/luci,palmettos/cnLuCI,Sakura-Winkey/LuCI,fkooman/luci,obsy/luci,florian-shellfire/luci,tcatm/luci,bright-things/ionic-luci,MinFu/luci,florian-shellfire/luci,cappiewu/luci,david-xiao/luci,lcf258/openwrtcn,jorgifumi/luci,artynet/luci,male-puppies/luci,schidler/ionic-luci,jlopenwrtluci/luci,maxrio/luci981213,oneru/luci,thesabbir/luci,taiha/luci,deepak78/new-luci,harveyhu2012/luci,obsy/luci,cshore-firmware/openwrt-luci,openwrt/luci,Hostle/luci,obsy/luci,RedSnake64/openwrt-luci-packages,opentechinstitute/luci,Noltari/luci,tobiaswaldvogel/luci,obsy/luci,tobiaswaldvogel/luci,aa65535/luci,taiha/luci,joaofvieira/luci,opentechinstitute/luci,aa65535/luci,lcf258/openwrtcn,LazyZhu/openwrt-luci-trunk-mod,deepak78/new-luci,aa65535/luci,keyidadi/luci,tobiaswaldvogel/luci,urueedi/luci,remakeelectric/luci,jchuang1977/luci-1,ff94315/luci-1,RedSnake64/openwrt-luci-packages,forward619/luci,forward619/luci,artynet/luci,artynet/luci,openwrt-es/openwrt-luci,openwrt/luci,Kyklas/luci-proto-hso,nmav/luci,Hostle/openwrt-luci-multi-user,palmettos/cnLuCI,shangjiyu/luci-with-extra,tcatm/luci,cshore/luci,obsy/luci,maxrio/luci981213,zhaoxx063/luci,db260179/openwrt-bpi-r1-luci,dwmw2/luci,rogerpueyo/luci,remakeelectric/luci,remakeelectric/luci,wongsyrone/luci-1,david-xiao/luci,db260179/openwrt-bpi-r1-luci,nmav/luci,rogerpueyo/luci,kuoruan/luci,Sakura-Winkey/LuCI,lcf258/openwrtcn,chris5560/openwrt-luci,fkooman/luci,openwrt/luci,florian-shellfire/luci,Hostle/openwrt-luci-multi-user,david-xiao/luci,aircross/OpenWrt-Firefly-LuCI,tcatm/luci,remakeelectric/luci,joaofvieira/luci,tcatm/luci,taiha/luci,Hostle/openwrt-luci-multi-user,nmav/luci,ReclaimYourPrivacy/cloak-luci,Sakura-Winkey/LuCI,marcel-sch/luci,chris5560/openwrt-luci,ollie27/openwrt_luci,bright-things/ionic-luci,daofeng2015/luci,NeoRaider/luci,thess/OpenWrt-luci,NeoRaider/luci,Hostle/luci,wongsyrone/luci-1,kuoruan/luci,lbthomsen/openwrt-luci,Noltari/luci,taiha/luci,cshore/luci,dismantl/luci-0.12,jlopenwrtluci/luci,jchuang1977/luci-1,cshore/luci,thess/OpenWrt-luci,oyido/luci,jchuang1977/luci-1,taiha/luci,sujeet14108/luci,kuoruan/luci,mumuqz/luci,bittorf/luci,joaofvieira/luci,LuttyYang/luci,dismantl/luci-0.12,kuoruan/lede-luci,palmettos/test,thesabbir/luci,tobiaswaldvogel/luci,jlopenwrtluci/luci,openwrt-es/openwrt-luci,lcf258/openwrtcn,openwrt-es/openwrt-luci,bright-things/ionic-luci,palmettos/test,slayerrensky/luci,chris5560/openwrt-luci,thesabbir/luci,rogerpueyo/luci,oneru/luci,981213/luci-1,daofeng2015/luci,lcf258/openwrtcn,LazyZhu/openwrt-luci-trunk-mod,tcatm/luci,lbthomsen/openwrt-luci,mumuqz/luci,slayerrensky/luci,kuoruan/luci,slayerrensky/luci,rogerpueyo/luci,opentechinstitute/luci,ff94315/luci-1,remakeelectric/luci,wongsyrone/luci-1,bright-things/ionic-luci,shangjiyu/luci-with-extra,nwf/openwrt-luci,ollie27/openwrt_luci,nmav/luci,Hostle/openwrt-luci-multi-user,Hostle/luci,male-puppies/luci,mumuqz/luci,slayerrensky/luci,hnyman/luci,fkooman/luci,remakeelectric/luci,lcf258/openwrtcn,cshore-firmware/openwrt-luci,oyido/luci,nwf/openwrt-luci,jlopenwrtluci/luci,openwrt/luci,harveyhu2012/luci,RedSnake64/openwrt-luci-packages,cshore-firmware/openwrt-luci,sujeet14108/luci,chris5560/openwrt-luci,ReclaimYourPrivacy/cloak-luci,fkooman/luci,aircross/OpenWrt-Firefly-LuCI,thesabbir/luci,florian-shellfire/luci,artynet/luci,keyidadi/luci,rogerpueyo/luci,hnyman/luci,marcel-sch/luci,Noltari/luci,teslamint/luci,maxrio/luci981213,zhaoxx063/luci,db260179/openwrt-bpi-r1-luci,mumuqz/luci,artynet/luci,Wedmer/luci,nwf/openwrt-luci,jchuang1977/luci-1,thess/OpenWrt-luci,LazyZhu/openwrt-luci-trunk-mod,forward619/luci,nwf/openwrt-luci,male-puppies/luci,harveyhu2012/luci,oyido/luci,jorgifumi/luci,harveyhu2012/luci,oneru/luci,taiha/luci,Wedmer/luci,maxrio/luci981213,artynet/luci,marcel-sch/luci,ff94315/luci-1,Hostle/openwrt-luci-multi-user,forward619/luci,schidler/ionic-luci,keyidadi/luci,bittorf/luci,oyido/luci,thess/OpenWrt-luci,thesabbir/luci,daofeng2015/luci,LazyZhu/openwrt-luci-trunk-mod,david-xiao/luci,jorgifumi/luci,Noltari/luci,LazyZhu/openwrt-luci-trunk-mod,joaofvieira/luci,lcf258/openwrtcn,schidler/ionic-luci,sujeet14108/luci,db260179/openwrt-bpi-r1-luci,bittorf/luci,dwmw2/luci,rogerpueyo/luci,nmav/luci,sujeet14108/luci,hnyman/luci,cshore/luci,Wedmer/luci,chris5560/openwrt-luci,Kyklas/luci-proto-hso,tcatm/luci,deepak78/new-luci,ReclaimYourPrivacy/cloak-luci,palmettos/test,981213/luci-1,shangjiyu/luci-with-extra,male-puppies/luci,nwf/openwrt-luci,bittorf/luci,thess/OpenWrt-luci,dwmw2/luci,MinFu/luci,forward619/luci,tcatm/luci,thess/OpenWrt-luci,cappiewu/luci,bright-things/ionic-luci,taiha/luci,hnyman/luci,cshore-firmware/openwrt-luci,NeoRaider/luci,urueedi/luci,cshore/luci,thess/OpenWrt-luci,RuiChen1113/luci,oyido/luci,dismantl/luci-0.12,ff94315/luci-1,cshore-firmware/openwrt-luci,aa65535/luci,male-puppies/luci,daofeng2015/luci,zhaoxx063/luci,openwrt/luci,RuiChen1113/luci,bright-things/ionic-luci,palmettos/cnLuCI,oneru/luci,dismantl/luci-0.12,RuiChen1113/luci,tobiaswaldvogel/luci,jlopenwrtluci/luci,opentechinstitute/luci,schidler/ionic-luci,tobiaswaldvogel/luci,male-puppies/luci,kuoruan/lede-luci,RuiChen1113/luci,Sakura-Winkey/LuCI,cappiewu/luci,aa65535/luci,mumuqz/luci,mumuqz/luci,david-xiao/luci,chris5560/openwrt-luci,rogerpueyo/luci,Wedmer/luci,marcel-sch/luci,tobiaswaldvogel/luci,aa65535/luci,joaofvieira/luci,ff94315/luci-1,Hostle/luci,david-xiao/luci,palmettos/test,hnyman/luci,male-puppies/luci,Kyklas/luci-proto-hso,shangjiyu/luci-with-extra,artynet/luci,jorgifumi/luci,obsy/luci,thesabbir/luci,openwrt-es/openwrt-luci,jlopenwrtluci/luci,teslamint/luci,nmav/luci,openwrt/luci,slayerrensky/luci,LuttyYang/luci,aircross/OpenWrt-Firefly-LuCI,jorgifumi/luci,cappiewu/luci,daofeng2015/luci,fkooman/luci,slayerrensky/luci,Wedmer/luci,artynet/luci,cappiewu/luci,teslamint/luci,hnyman/luci,Hostle/openwrt-luci-multi-user,fkooman/luci,981213/luci-1,db260179/openwrt-bpi-r1-luci,ReclaimYourPrivacy/cloak-luci,aircross/OpenWrt-Firefly-LuCI,shangjiyu/luci-with-extra,opentechinstitute/luci,cshore/luci,nwf/openwrt-luci,chris5560/openwrt-luci,Sakura-Winkey/LuCI,hnyman/luci,LuttyYang/luci,ollie27/openwrt_luci,lbthomsen/openwrt-luci,jchuang1977/luci-1,jorgifumi/luci,bittorf/luci,joaofvieira/luci,jlopenwrtluci/luci,RuiChen1113/luci,Noltari/luci,nwf/openwrt-luci,cshore-firmware/openwrt-luci,keyidadi/luci,deepak78/new-luci,bittorf/luci,Noltari/luci,marcel-sch/luci,LazyZhu/openwrt-luci-trunk-mod,tobiaswaldvogel/luci,Hostle/luci,cappiewu/luci,obsy/luci,keyidadi/luci,openwrt-es/openwrt-luci,aa65535/luci,Hostle/luci,RedSnake64/openwrt-luci-packages,dismantl/luci-0.12,MinFu/luci,dwmw2/luci,ff94315/luci-1,ff94315/luci-1,urueedi/luci,keyidadi/luci,schidler/ionic-luci,david-xiao/luci,NeoRaider/luci,Wedmer/luci,teslamint/luci,jlopenwrtluci/luci,Sakura-Winkey/LuCI,aircross/OpenWrt-Firefly-LuCI,jchuang1977/luci-1,Wedmer/luci,jchuang1977/luci-1,deepak78/new-luci,palmettos/test,dwmw2/luci,Noltari/luci,taiha/luci,kuoruan/lede-luci,Sakura-Winkey/LuCI,sujeet14108/luci,bittorf/luci,kuoruan/luci,Kyklas/luci-proto-hso,palmettos/cnLuCI,981213/luci-1,tcatm/luci,schidler/ionic-luci,schidler/ionic-luci,Hostle/openwrt-luci-multi-user,sujeet14108/luci,teslamint/luci,NeoRaider/luci,LazyZhu/openwrt-luci-trunk-mod,ollie27/openwrt_luci,zhaoxx063/luci,wongsyrone/luci-1,ollie27/openwrt_luci,RuiChen1113/luci,NeoRaider/luci,Kyklas/luci-proto-hso,sujeet14108/luci,cshore-firmware/openwrt-luci,db260179/openwrt-bpi-r1-luci,daofeng2015/luci,jorgifumi/luci,ReclaimYourPrivacy/cloak-luci,NeoRaider/luci,obsy/luci,openwrt-es/openwrt-luci,LuttyYang/luci,981213/luci-1,harveyhu2012/luci,oneru/luci,dwmw2/luci,florian-shellfire/luci,oyido/luci,LuttyYang/luci,kuoruan/lede-luci,Hostle/openwrt-luci-multi-user,LuttyYang/luci,marcel-sch/luci,thesabbir/luci,urueedi/luci,RedSnake64/openwrt-luci-packages,opentechinstitute/luci,981213/luci-1,cappiewu/luci,artynet/luci,sujeet14108/luci,lbthomsen/openwrt-luci,zhaoxx063/luci,kuoruan/luci,palmettos/cnLuCI,cshore/luci,daofeng2015/luci,shangjiyu/luci-with-extra,palmettos/cnLuCI,florian-shellfire/luci,cshore-firmware/openwrt-luci,deepak78/new-luci,maxrio/luci981213,Noltari/luci,Wedmer/luci,remakeelectric/luci,nmav/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,zhaoxx063/luci,palmettos/cnLuCI,teslamint/luci,harveyhu2012/luci,urueedi/luci