Fix other instances of off-by-one error.

scripts/extractors/generic.py

@@ -128,6 +128,10 @@ def extract (url, page=None, network=False, verbosity=3, args={}):
 		feed = extract_from_page (page, verbosity, url, args)
 		if not feed is None:
 			if feed.startswith("/"):
-				domain = url[:url.find("/",url.find("//")+2)]
+				index = url.find("/",url.find("//")+2)
+				if index == -1:
+					domain = url
+				else:
+					domain = url[:index]
 				feed = domain + feed
 			return feed

scripts/extractors/tumblr.py

@@ -12,6 +12,10 @@ if platform.endswith(".py"):
 def extract_from_url (url, verbosity):
 	# split into domain and path
 	index = url.find("/",url.find("//")+2)
+	if index == -1:
+		domain = url
+		path = "/"
+	else:
 		domain = url[:index]
 		path = url[index:]