[facebook] Correct regexp

youtube_dl/extractor/facebook.py

@@ -55,7 +55,7 @@ class FacebookIE(InfoExtractor):
         login_page = self._download_webpage(login_page_req, None, note=False,
             errnote='Unable to download login page')
         lsd = self._search_regex(
-            r'<input type="hidden" name="lsd" value="([^""]*)"',
+            r'<input type="hidden" name="lsd" value="([^"]*)"',
             login_page, 'lsd')
         lgnrnd = self._search_regex(r'name="lgnrnd" value="([^"]*?)"', login_page, 'lgnrnd')