SDL: wayland: fix memleak in output listener

SDL Commits
1 
From 68ca35c318b3f4b6f36e1e3650fd75fef7b6e022 Mon Sep 17 00:00:00 2001
From: Andrei Alexeyev <[EMAIL REDACTED]>
Date: Wed, 11 Aug 2021 21:40:46 +0300
Subject: [PATCH] wayland: fix memleak in output listener

---
 src/video/wayland/SDL_waylandvideo.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/video/wayland/SDL_waylandvideo.c b/src/video/wayland/SDL_waylandvideo.c
index 01e553063..1cd67aaf4 100644
--- a/src/video/wayland/SDL_waylandvideo.c
+++ b/src/video/wayland/SDL_waylandvideo.c
@@ -391,6 +391,7 @@ display_handle_done(void *data,
 
     driverdata->placeholder.driverdata = driverdata;
     SDL_AddVideoDisplay(&driverdata->placeholder, SDL_FALSE);
+    SDL_free(driverdata->placeholder.name);
     SDL_zero(driverdata->placeholder);
 }