ehea: Fixed possible nullpointer access

Fixed possible nullpointer access in event queue processing

Signed-off-by: Thomas Klein <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/ehea/ehea_main.c

···
 	int i;
 
 	for (i = 0; i < adapter->num_ports; i++)
-		if (adapter->port[i]->logical_port_id == logical_port)
-			return adapter->port[i];
+		if (adapter->port[i])
+	                if (adapter->port[i]->logical_port_id == logical_port)
+				return adapter->port[i];
 	return NULL;
 }