added check for cssFiles exists
added check for cssFiles exists

bordar/mwEmbed,tanyaLibatter/mwEmbed,DBezemer/mwEmbed,kaltura/mwEmbed,panda-os/mwEmbed,alexmilk/mwEmbed,kaltura/mwEmbed,FlixMaster/mwEmbed,joanpuigsanz/mwEmbed,FlixMaster/mwEmbed,abaylis/mwEmbed,matsuu/mwEmbed,vladm3/mwEmbed,abaylis/mwEmbed,vladm3/mwEmbed,DBezemer/mwEmbed,matsuu/mwEmbed,kaltura/mwEmbed,kaltura/mwEmbed,matsuu/mwEmbed,safarijv/mwEmbed,slash851/mwEmbed,tanyaLibatter/mwEmbed,alexmilk/mwEmbed,alexmilk/mwEmbed,tanyaLibatter/mwEmbed,panda-os/mwEmbed,safarijv/mwEmbed,matsuu/mwEmbed,alexmilk/mwEmbed,slash851/mwEmbed,bordar/mwEmbed,slash851/mwEmbed,joanpuigsanz/mwEmbed,SVSG/mwEmbed,abaylis/mwEmbed,panda-os/mwEmbed,abaylis/mwEmbed,DBezemer/mwEmbed,tanyaLibatter/mwEmbed,SVSG/mwEmbed,omridevk/mwEmbed,safarijv/mwEmbed,joanpuigsanz/mwEmbed,SVSG/mwEmbed,omridevk/mwEmbed,joanpuigsanz/mwEmbed,FlixMaster/mwEmbed,vladm3/mwEmbed,bordar/mwEmbed,DBezemer/mwEmbed,safarijv/mwEmbed,panda-os/mwEmbed,SVSG/mwEmbed,FlixMaster/mwEmbed,omridevk/mwEmbed,bordar/mwEmbed,slash851/mwEmbed,vladm3/mwEmbed,omridevk/mwEmbed