If both dbhost and dbsock were not set, a NULL deref could result

Reported by: xrg
Patch by: tilghman
(Closes issue #11387)


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.4@90736 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_config_pgsql.c

@@ -720,7 +720,9 @@ static int parse_config(void)
 		dbport = atoi(s);
 	}
 
-	if (!ast_strlen_zero(dbhost) && !(s = ast_variable_retrieve(config, "general", "dbsock"))) {
+	if (!ast_strlen_zero(dbhost)) {
+		/* No socket needed */
+	} else if (!(s = ast_variable_retrieve(config, "general", "dbsock"))) {
 		ast_log(LOG_WARNING,
 				"Postgresql RealTime: No database socket found, using '/tmp/pgsql.sock' as default.\n");
 		strcpy(dbsock, "/tmp/pgsql.sock");