added check for null MuxChannel on merge
added check for null MuxChannel on merge

slaskawi/JGroups,tristantarrant/JGroups,dimbleby/JGroups,danberindei/JGroups,tristantarrant/JGroups,vjuranek/JGroups,kedzie/JGroups,Sanne/JGroups,rhusar/JGroups,kedzie/JGroups,ligzy/JGroups,rhusar/JGroups,rvansa/JGroups,TarantulaTechnology/JGroups,TarantulaTechnology/JGroups,TarantulaTechnology/JGroups,deepnarsay/JGroups,pferraro/JGroups,danberindei/JGroups,rpelisse/JGroups,Sanne/JGroups,vjuranek/JGroups,dimbleby/JGroups,ligzy/JGroups,vjuranek/JGroups,pferraro/JGroups,pruivo/JGroups,ibrahimshbat/JGroups,belaban/JGroups,kedzie/JGroups,slaskawi/JGroups,Sanne/JGroups,slaskawi/JGroups,rvansa/JGroups,ibrahimshbat/JGroups,deepnarsay/JGroups,pruivo/JGroups,rpelisse/JGroups,ibrahimshbat/JGroups,pferraro/JGroups,pruivo/JGroups,belaban/JGroups,ligzy/JGroups,rpelisse/JGroups,deepnarsay/JGroups,rhusar/JGroups,ibrahimshbat/JGroups,belaban/JGroups,danberindei/JGroups,dimbleby/JGroups