Close file before return

weed/command/download.go

@@ -121,8 +121,9 @@ func WriteFile(filename string, data []byte, perm os.FileMode) error {
 	if err != nil {
 		return err
 	}
+	
+	defer f.Close()
 	n, err := f.Write(data)
-	f.Close()
 	if err == nil && n < len(data) {
 		err = io.ErrShortWrite
 	}