added check for NPE
added check for NPE

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