remove warning for FEED_DOMAIN when SITEURL undefined
remove warning for FEED_DOMAIN when SITEURL undefined

fbs/pelican,farseerfc/pelican,iKevinY/pelican,treyhunner/pelican,joetboole/pelican,ingwinlu/pelican,Rogdham/pelican,joetboole/pelican,talha131/pelican,Polyconseil/pelican,levanhien8/pelican,lucasplus/pelican,janaurka/git-debug-presentiation,abrahamvarricatt/pelican,simonjj/pelican,JeremyMorgan/pelican,jvehent/pelican,Polyconseil/pelican,karlcow/pelican,51itclub/pelican,GiovanniMoretti/pelican,liyonghelpme/myBlog,levanhien8/pelican,TC01/pelican,rbarraud/pelican,koobs/pelican,gymglish/pelican,sunzhongwei/pelican,jimperio/pelican,abrahamvarricatt/pelican,lazycoder-ru/pelican,iurisilvio/pelican,Summonee/pelican,abrahamvarricatt/pelican,justinmayer/pelican,ionelmc/pelican,avaris/pelican,ehashman/pelican,alexras/pelican,jimperio/pelican,rbarraud/pelican,goerz/pelican,douglaskastle/pelican,Scheirle/pelican,douglaskastle/pelican,goerz/pelican,number5/pelican,HyperGroups/pelican,ingwinlu/pelican,avaris/pelican,deanishe/pelican,number5/pelican,UdeskDeveloper/pelican,Summonee/pelican,alexras/pelican,btnpushnmunky/pelican,gymglish/pelican,arty-name/pelican,Rogdham/pelican,zackw/pelican,lazycoder-ru/pelican,getpelican/pelican,florianjacob/pelican,lucasplus/pelican,garbas/pelican,zackw/pelican,ehashman/pelican,farseerfc/pelican,TC01/pelican,treyhunner/pelican,catdog2/pelican,sunzhongwei/pelican,crmackay/pelican,number5/pelican,11craft/pelican,crmackay/pelican,GiovanniMoretti/pelican,Summonee/pelican,levanhien8/pelican,liyonghelpme/myBlog,ls2uper/pelican,getpelican/pelican,alexras/pelican,liyonghelpme/myBlog,koobs/pelican,joetboole/pelican,deanishe/pelican,koobs/pelican,JeremyMorgan/pelican,karlcow/pelican,janaurka/git-debug-presentiation,gymglish/pelican,Rogdham/pelican,douglaskastle/pelican,UdeskDeveloper/pelican,TC01/pelican,kennethlyn/pelican,karlcow/pelican,kennethlyn/pelican,11craft/pelican,catdog2/pelican,deved69/pelican-1,lazycoder-ru/pelican,treyhunner/pelican,jimperio/pelican,rbarraud/pelican,talha131/pelican,jvehent/pelican,simonjj/pelican,lucasplus/pelican,btnpushnmunky/pelican,Scheirle/pelican,kennethlyn/pelican,iurisilvio/pelican,deved69/pelican-1,iurisilvio/pelican,catdog2/pelican,crmackay/pelican,51itclub/pelican,sunzhongwei/pelican,ls2uper/pelican,liyonghelpme/myBlog,eevee/pelican,HyperGroups/pelican,garbas/pelican,sunzhongwei/pelican,florianjacob/pelican,HyperGroups/pelican,jvehent/pelican,51itclub/pelican,simonjj/pelican,deved69/pelican-1,janaurka/git-debug-presentiation,JeremyMorgan/pelican,iKevinY/pelican,btnpushnmunky/pelican,garbas/pelican,kernc/pelican,goerz/pelican,11craft/pelican,eevee/pelican,jo-tham/pelican,kernc/pelican,liyonghelpme/myBlog,kernc/pelican,GiovanniMoretti/pelican,ls2uper/pelican,ehashman/pelican,eevee/pelican,0xMF/pelican,florianjacob/pelican,Scheirle/pelican,UdeskDeveloper/pelican,zackw/pelican,jo-tham/pelican,deanishe/pelican