netxen_nic: signedness bug in netxen_md_entry_err_chk()

"esize" should be signed because it can be negative here.  For example,
when we call it in netxen_parse_md_template(), it could be -1 from the
return value of netxen_md_L2Cache().
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/qlogic/netxen/netxen_nic_hw.c

@@ -2354,7 +2354,7 @@ netxen_md_rdqueue(struct netxen_adapter *adapter,
 */
 
 static int netxen_md_entry_err_chk(struct netxen_adapter *adapter,
-				struct netxen_minidump_entry *entry, u32 esize)
+				struct netxen_minidump_entry *entry, int esize)
 {
 	if (esize < 0) {
 		entry->hdr.driver_flags |= NX_DUMP_SKIP;