mute warnings caused by session_start() to deal with potential ps_files_cleanup_dir stuff

api/index.php

@@ -48,7 +48,7 @@
 		session_id($_REQUEST["sid"]);
 	}
 
-	session_start();
+	@session_start();
 
 	if (!init_connection($link)) return;
 

include/sessions.php

@@ -105,6 +105,6 @@
 	session_set_cookie_params(SESSION_COOKIE_LIFETIME);
 
 	if (!defined('TTRSS_SESSION_NAME') || TTRSS_SESSION_NAME != 'ttrss_api_sid') {
-		session_start();
+		@session_start();
 	}
 ?>