ehea: Fixed possible nullpointer access

Fixed possible nullpointer access in event queue processing
Signed-off-by: Thomas Klein <tklein@de.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/net/ehea/ehea_main.c

@@ -575,6 +575,7 @@ static struct ehea_port *ehea_get_port(struct ehea_adapter *adapter,
 	int i;
 
 	for (i = 0; i < adapter->num_ports; i++)
+		if (adapter->port[i])
 	                if (adapter->port[i]->logical_port_id == logical_port)
 				return adapter->port[i];
 	return NULL;