small fix for initialization of host address in case not actual address could be obtained

src/util.cpp

@@ -425,6 +425,9 @@ bool LlconNetwUtil::ParseNetworkAddress ( QString        strAddress,
     QHostAddress InetAddr;
     quint16      iNetPort = LLCON_DEFAULT_PORT_NUMBER;
 
+    // init requested host address with invalid address first
+    HostAddress = CHostAddress();
+
     // parse input address for the type [IP address]:[port number]
     QString strPort = strAddress.section ( ":", 1, 1 );
     if ( !strPort.isEmpty() )