asyn-ares: We prefer use of 'CURLcode result'

lib/asyn-ares.c

@@ -315,7 +315,7 @@ CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
   struct SessionHandle *data = conn->data;
   struct ResolverResults *res = (struct ResolverResults *)
     conn->async.os_specific;
-  CURLcode rc = CURLE_OK;
+  CURLcode result = CURLE_OK;
 
   *dns = NULL;
 
@@ -329,7 +329,7 @@ CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
     if(!conn->async.dns) {
       failf(data, "Could not resolve: %s (%s)",
             conn->async.hostname, ares_strerror(conn->async.status));
-      rc = conn->bits.proxy?CURLE_COULDNT_RESOLVE_PROXY:
+      result = conn->bits.proxy?CURLE_COULDNT_RESOLVE_PROXY:
         CURLE_COULDNT_RESOLVE_HOST;
     }
     else
@@ -338,7 +338,7 @@ CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
     destroy_async_data(&conn->async);
   }
 
-  return rc;
+  return result;
 }
 
 /*
@@ -355,7 +355,7 @@ CURLcode Curl_resolver_is_resolved(struct connectdata *conn,
 CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
                                    struct Curl_dns_entry **entry)
 {
-  CURLcode rc=CURLE_OK;
+  CURLcode result = CURLE_OK;
   struct SessionHandle *data = conn->data;
   long timeout;
   struct timeval now = Curl_tvnow();
@@ -394,7 +394,7 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
       break;
 
     if(Curl_pgrsUpdate(conn)) {
-      rc = CURLE_ABORTED_BY_CALLBACK;
+      result = CURLE_ABORTED_BY_CALLBACK;
       timeout = -1; /* trigger the cancel below */
     }
     else {
@@ -403,6 +403,7 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
       timeout -= timediff?timediff:1; /* always deduct at least 1 */
       now = now2; /* for next loop */
     }
+
     if(timeout < 0) {
       /* our timeout, so we cancel the ares operation */
       ares_cancel((ares_channel)data->state.resolver);
@@ -412,18 +413,17 @@ CURLcode Curl_resolver_wait_resolv(struct connectdata *conn,
 
   /* Operation complete, if the lookup was successful we now have the entry
      in the cache. */
-
   if(entry)
     *entry = conn->async.dns;
 
-  if(rc)
+  if(result)
     /* close the connection, since we can't return failure here without
        cleaning up this connection properly.
        TODO: remove this action from here, it is not a name resolver decision.
     */
     connclose(conn, "c-ares resolve failed");
 
-  return rc;
+  return result;
 }
 
 /* Connects results to the list */