vo_gpu_next: check if existing cache file has correct size

video/out/vo_gpu_next.c

@@ -1650,7 +1650,8 @@ static void cache_save_obj(void *p, pl_cache_obj obj)
     }
 
     // Don't save if already exists
-    if (!stat(filepath, &(struct stat){0})) {
+    struct stat st;
+    if (!stat(filepath, &st) && st.st_size == obj.size) {
         MP_DBG(c, "%s: key(%"PRIx64"), size(%zu)\n", __func__, obj.key, obj.size);
         goto done;
     }