[common]revert #1940 for it breaks sohu

src/you_get/common.py

@@ -545,6 +545,7 @@ def url_save(url, filepath, bar, refer = None, is_part = False, faker = False, h
             headers = headers
         else:
             headers = {}
+        if received:
             headers['Range'] = 'bytes=' + str(received) + '-'
         if refer:
             headers['Referer'] = refer