Don't check blank urls. Partial fix for #784.
Don't check blank urls. Partial fix for #784.

aguzubiaga/refinerycms,mlinfoot/refinerycms,louim/refinerycms,mabras/refinerycms,chrise86/refinerycms,mkaplan9/refinerycms,hoopla-software/refinerycms,Retimont/refinerycms,anitagraham/refinerycms,chrise86/refinerycms,refinery/refinerycms,bryanmtl/g-refinerycms,simi/refinerycms,kappiah/refinerycms,simi/refinerycms,bricesanchez/refinerycms,stefanspicer/refinerycms,trevornez/refinerycms,johanb/refinerycms,hoopla-software/refinerycms,simi/refinerycms,mkaplan9/refinerycms,SmartMedia/refinerycms-with-custom-icons,Eric-Guo/refinerycms,KingLemuel/refinerycms,Eric-Guo/refinerycms,sideci-sample/sideci-sample-refinerycms,stefanspicer/refinerycms,kappiah/refinerycms,kelkoo-services/refinerycms,mabras/refinerycms,bricesanchez/refinerycms,mojarra/myrefinerycms,trevornez/refinerycms,anitagraham/refinerycms,LytayTOUCH/refinerycms,sideci-sample/sideci-sample-refinerycms,mojarra/myrefinerycms,donabrams/refinerycms,mlinfoot/refinerycms,gwagener/refinerycms,Retimont/refinerycms,gwagener/refinerycms,KingLemuel/refinerycms,anitagraham/refinerycms,aguzubiaga/refinerycms,Retimont/refinerycms,stefanspicer/refinerycms,bryanmtl/g-refinerycms,KingLemuel/refinerycms,trevornez/refinerycms,refinery/refinerycms,aguzubiaga/refinerycms,LytayTOUCH/refinerycms,kelkoo-services/refinerycms,mlinfoot/refinerycms,SmartMedia/refinerycms-with-custom-icons,gwagener/refinerycms,chrise86/refinerycms,mabras/refinerycms,johanb/refinerycms,simi/refinerycms,donabrams/refinerycms,louim/refinerycms,johanb/refinerycms,mkaplan9/refinerycms,pcantrell/refinerycms,kappiah/refinerycms,mobilityhouse/refinerycms,mobilityhouse/refinerycms,refinery/refinerycms,LytayTOUCH/refinerycms,Eric-Guo/refinerycms,hoopla-software/refinerycms,pcantrell/refinerycms