Check for valid input to GetProtocolHandler.

getprotocolhandler.diff

diff --git a/sources/thelib/src/application/baseclientapplication.cpp b/sources/thelib/src/application/baseclientapplication.cpp
index f308186..063b179 100644
--- a/sources/thelib/src/application/baseclientapplication.cpp
+++ b/sources/thelib/src/application/baseclientapplication.cpp
@@ -154,6 +154,7 @@ bool BaseClientApplication::StreamNameAvailable(string streamName,
 }
 
 BaseAppProtocolHandler *BaseClientApplication::GetProtocolHandler(BaseProtocol *pProtocol) {
+	if (NULL == pProtocol) return NULL;
 	return GetProtocolHandler(pProtocol->GetType());
 }