Make sure enough memory is allocated for a struct pft_entry when

refreshing the list of pf tables.

OKed by:	philip
MFC after:	1 week

usr.sbin/bsnmpd/modules/snmp_pf/pf_snmp.c

@@ -1104,7 +1104,7 @@ pft_refresh(void)
 	}
 
 	for (i = 0; i < numtbls; i++) {
-		e = malloc(sizeof(struct pfr_tstats));
+		e = malloc(sizeof(struct pft_entry));
 		if (e == NULL)
 			goto err1;
 		e->index = i + 1;