driver/rcinput.cpp: increase neutrino.sock listen backlog -

try to avoid dead-lock on zap flood, when neutrino wait response for command,
while zapit try to send event to neutrino

src/driver/rcinput.cpp

@@ -123,7 +123,7 @@ CRCInput::CRCInput()
 	}
 
 
-	if (listen(fd_event, 15) !=0)
+	if (listen(fd_event, 25) !=0)
 	{
 		perror("[neutrino] listen failed...\n");
 		exit( -1 );