Rationalise DNS packet-buffer size calculations.
diff --git a/src/dnsmasq.h b/src/dnsmasq.h
index 044c865..7f6dd7e 100644
--- a/src/dnsmasq.h
+++ b/src/dnsmasq.h
@@ -1048,7 +1048,7 @@
#endif
/* dnssec.c */
-size_t dnssec_generate_query(struct dns_header *header, char *name, int class, int type, union mysockaddr *addr);
+size_t dnssec_generate_query(struct dns_header *header, char *end, char *name, int class, int type, union mysockaddr *addr);
int dnssec_validate_by_ds(time_t now, struct dns_header *header, size_t n, char *name, char *keyname, int class);
int dnssec_validate_ds(time_t now, struct dns_header *header, size_t plen, char *name, char *keyname, int class);
int validate_rrset(time_t now, struct dns_header *header, size_t plen, int class,