Port number must be always initialized otherwise it becomes zero in case of using unix socket without "port=" parameter

Author: Andrey Alcheev

Diff for: src/ngx_postgres_module.c

@@ -442,8 +442,7 @@ ngx_postgres_conf_server(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
 
     pgs->addrs = u.addrs;
     pgs->naddrs = u.naddrs;
-    if(u.family != AF_UNIX)
-        pgs->port = u.port;
+    pgs->port = u.family == AF_UNIX ? u.default_port : u.port;
     pgs->family = u.family;
 
     /* parse various options */