동영상의 썸네일이 가끔 흰색으로 잘못 생성되던 버그 수정

src/lib/modules/file/cache.ts

@@ -54,9 +54,7 @@ export const deleteFileCache = async (fileId: number) => {
 
 export const getFileThumbnailCache = async (fileId: number) => {
   const thumbnail = loadedThumbnails.get(fileId);
-  if (thumbnail) {
-    return thumbnail;
-  }
+  if (thumbnail) return thumbnail;
 
   const thumbnailBuffer = await readFile(`/thumbnail/file/${fileId}`);
   if (!thumbnailBuffer) return null;