Gossip comm NPE fix
Gossip comm NPE fix

Fix a possible NPE situation.
Error returned before the fix could be nil, therefore nil, nil was returned
instead of nil and an error

Change-Id: I6c4b592be63626cc7a11f81b19311fe71361c95b
Signed-off-by: Yacov Manevich <632344b5da9bd743456189af4db4b56472defb8c@il.ibm.com>

lukehuangch/fabric,tkuhrt/fabric,kchristidis/fabric,bmos299/fabric,stemlending/fabric,blockc/fabric,rameshthoomu/fabric,cophey/fabric,cophey/fabric,blockc/fabric,thakkarparth007/fabric,chrisguoado/fabric,manish-sethi/fabric-sidedb,ckeyer/fabric,rameshbabu79/fabric,magg/fabric,mffrench/fabric,chrisguoado/fabric,rameshthoomu/fabric,tkuhrt/fabric,ibmmark/fabric,tkuhrt/fabric,blockc/fabric,magg/fabric,chrisguoado/fabric,thakkarparth007/fabric,king3000/fabric,mqshen/fabric,ckeyer/fabric,king3000/fabric,bmos299/fabric,mffrench/fabric,ckeyer/fabric,binhn/fabric,manish-sethi/fabric-sidedb,Ryan--Yang/fabric,blockc/fabric,Ryan--Yang/fabric,rameshbabu79/fabric,manish-sethi/fabric-sidedb,christo4ferris/fabric-docs,phariel/fabric,binhn/fabric,hyperledger/fabric,cophey/fabric,thakkarparth007/fabric,tkuhrt/fabric,xixuejia/fabric,thakkarparth007/fabric,lukehuangch/fabric,kchristidis/fabric,ibmmark/fabric,Ryan--Yang/fabric,magg/fabric,thakkarparth007/fabric,phariel/fabric,mqshen/fabric,bmos299/fabric,rameshbabu79/fabric,Ryan--Yang/fabric,mffrench/fabric,king3000/fabric,stemlending/fabric,ckeyer/fabric,phariel/fabric,lukehuangch/fabric,stemlending/fabric,rameshthoomu/fabric,blockc/fabric,chrisguoado/fabric,christo4ferris/fabric-docs,ckeyer/fabric,manish-sethi/fabric-sidedb,lukehuangch/fabric,king3000/fabric,christo4ferris/fabric-docs,xixuejia/fabric,kchristidis/fabric,manish-sethi/fabric-sidedb,masterDev1985/fabric,ibmmark/fabric,christo4ferris/fabric-docs,lukehuangch/fabric,mffrench/fabric,cophey/fabric,cophey/fabric,king3000/fabric,mqshen/fabric,mffrench/fabric,ibmmark/fabric,chrisguoado/fabric,manish-sethi/fabric,christo4ferris/fabric-docs,cophey/fabric,mffrench/fabric,king3000/fabric,king3000/fabric,binhn/fabric,xixuejia/fabric,magg/fabric,magg/fabric,masterDev1985/fabric,stemlending/fabric,thakkarparth007/fabric,ibmmark/fabric,chrisguoado/fabric,jimthematrix/fabric,lukehuangch/fabric,manish-sethi/fabric,manish-sethi/fabric-sidedb,mffrench/fabric,kchristidis/fabric,kchristidis/fabric,mqshen/fabric,rameshbabu79/fabric,blockc/fabric,bmos299/fabric,phariel/fabric,mqshen/fabric,bmos299/fabric,cophey/fabric,masterDev1985/fabric,muralisrini/fabric,kchristidis/fabric,kchristidis/fabric,phariel/fabric,phariel/fabric,rameshbabu79/fabric,chrisguoado/fabric,bmos299/fabric,ckeyer/fabric,tkuhrt/fabric,masterDev1985/fabric,rameshthoomu/fabric,manish-sethi/fabric-sidedb,muralisrini/fabric,blockc/fabric,ibmmark/fabric,mqshen/fabric,phariel/fabric,Ryan--Yang/fabric,rameshthoomu/fabric,Ryan--Yang/fabric,magg/fabric,jimthematrix/fabric,Ryan--Yang/fabric,mqshen/fabric,rameshthoomu/fabric,tkuhrt/fabric,ckeyer/fabric,masterDev1985/fabric,tkuhrt/fabric,christo4ferris/fabric-docs,ibmmark/fabric,thakkarparth007/fabric,magg/fabric,bmos299/fabric,muralisrini/fabric,rameshthoomu/fabric,lukehuangch/fabric,hyperledger/fabric