Set default site to null instead of ''
Set default site to null instead of ''

zazabe/cm,tomaszdurka/CM,njam/CM,fauvel/CM,fauvel/CM,zazabe/cm,alexispeter/CM,vogdb/cm,vogdb/cm,zazabe/cm,tomaszdurka/CM,christopheschwyzer/CM,zazabe/cm,alexispeter/CM,vogdb/cm,fauvel/CM,vogdb/cm,njam/CM,tomaszdurka/CM,vogdb/cm,njam/CM,fauvel/CM,cargomedia/CM,christopheschwyzer/CM,cargomedia/CM,mariansollmann/CM,fvovan/CM,tomaszdurka/CM,mariansollmann/CM,christopheschwyzer/CM,mariansollmann/CM,njam/CM,fauvel/CM,tomaszdurka/CM,mariansollmann/CM,alexispeter/CM,cargomedia/CM,fvovan/CM,alexispeter/CM,njam/CM,christopheschwyzer/CM,fvovan/CM,cargomedia/CM,fvovan/CM