[minor] don't display missing file doc message in item's make thumbnail
[minor] don't display missing file doc message in item's make thumbnail

ShashaQin/erpnext,sagar30051991/ozsmart-erp,SPKian/Testing,indictranstech/erpnext,gangadhar-kadam/helpdesk-erpnext,susuchina/ERPNEXT,indictranstech/biggift-erpnext,hatwar/buyback-erpnext,anandpdoshi/erpnext,MartinEnder/erpnext-de,indictranstech/trufil-erpnext,susuchina/ERPNEXT,ShashaQin/erpnext,gangadharkadam/v6_erp,indictranstech/trufil-erpnext,sagar30051991/ozsmart-erp,sagar30051991/ozsmart-erp,SPKian/Testing2,njmube/erpnext,gangadhar-kadam/helpdesk-erpnext,MartinEnder/erpnext-de,MartinEnder/erpnext-de,aruizramon/alec_erpnext,mbauskar/helpdesk-erpnext,aruizramon/alec_erpnext,SPKian/Testing2,indictranstech/biggift-erpnext,mahabuber/erpnext,shft117/SteckerApp,SPKian/Testing,geekroot/erpnext,indictranstech/osmosis-erpnext,indictranstech/biggift-erpnext,ShashaQin/erpnext,gsnbng/erpnext,mbauskar/sapphire-erpnext,hatwar/buyback-erpnext,shft117/SteckerApp,gsnbng/erpnext,gangadharkadam/v6_erp,mbauskar/helpdesk-erpnext,SPKian/Testing2,susuchina/ERPNEXT,gangadhar-kadam/helpdesk-erpnext,mbauskar/sapphire-erpnext,geekroot/erpnext,mbauskar/sapphire-erpnext,indictranstech/erpnext,gangadharkadam/v6_erp,MartinEnder/erpnext-de,mbauskar/sapphire-erpnext,mahabuber/erpnext,geekroot/erpnext,indictranstech/osmosis-erpnext,mahabuber/erpnext,anandpdoshi/erpnext,gsnbng/erpnext,hatwar/buyback-erpnext,SPKian/Testing2,anandpdoshi/erpnext,susuchina/ERPNEXT,njmube/erpnext,indictranstech/trufil-erpnext,anandpdoshi/erpnext,shft117/SteckerApp,indictranstech/biggift-erpnext,mbauskar/helpdesk-erpnext,njmube/erpnext,aruizramon/alec_erpnext,mahabuber/erpnext,aruizramon/alec_erpnext,indictranstech/erpnext,Aptitudetech/ERPNext,gangadhar-kadam/helpdesk-erpnext,gangadharkadam/v6_erp,ShashaQin/erpnext,sagar30051991/ozsmart-erp,indictranstech/erpnext,indictranstech/osmosis-erpnext,gsnbng/erpnext,SPKian/Testing,indictranstech/trufil-erpnext,geekroot/erpnext,mbauskar/helpdesk-erpnext,indictranstech/osmosis-erpnext,SPKian/Testing,hatwar/buyback-erpnext,njmube/erpnext,shft117/SteckerApp