ares_search_dnsrec() takes a const

docs/ares_search.3

@@ -15,7 +15,7 @@ typedef void (*ares_callback_dnsrec)(void *\fIarg\fP,
                                      const ares_dns_record_t *\fIdnsrec\fP);
 
 void ares_search_dnsrec(ares_channel_t *\fIchannel\fP,
-                        ares_dns_record_t *\fIdnsrec\fP,
+                        const ares_dns_record_t *\fIdnsrec\fP,
                         ares_callback_dnsrec \fIcallback\fP, void *\fIarg\fP);
 
 typedef void (*ares_callback)(void *\fIarg\fP, int \fIstatus\fP,

include/ares.h

@@ -588,7 +588,7 @@ CARES_EXTERN CARES_DEPRECATED_FOR(ares_search_dnsrec)
  *          to the provided callback.
  */
 CARES_EXTERN ares_status_t ares_search_dnsrec(ares_channel_t *channel,
-                                              ares_dns_record_t *dnsrec,
+                                              const ares_dns_record_t *dnsrec,
                                               ares_callback_dnsrec callback,
                                               void *arg);
 

src/lib/ares_search.c

@@ -447,7 +447,7 @@ void ares_search(ares_channel_t *channel, const char *name, int dnsclass,
 
 /* Search for a DNS record. Wrapper around ares_search_int(). */
 ares_status_t ares_search_dnsrec(ares_channel_t *channel,
-                                 ares_dns_record_t *dnsrec,
+                                 const ares_dns_record_t *dnsrec,
                                  ares_callback_dnsrec callback, void *arg)
 {
   ares_status_t              status;