Be a bit safer in case pw_name doesn't exist

cli-runopts.c

@@ -683,11 +683,13 @@ static void fill_own_user() {
 	uid = getuid();
 
 	pw = getpwuid(uid);
-	if (pw == NULL || pw->pw_name == NULL) {
+	if (pw && pw->pw_name != NULL) {
+		cli_opts.own_user = m_strdup(pw->pw_name);
+	} else {
 		dropbear_log(LOG_INFO, "Warning: failed to identify current user. Trying anyway.");
+		cli_opts.own_user = m_strdup("unknown");
 	}
 
-	cli_opts.own_user = m_strdup(pw->pw_name);
 }
 
 #ifdef ENABLE_CLI_ANYTCPFWD