update and manipulate existing docs without upsert

Author: Reed O'Brien

pymongo/collection.py

@@ -352,7 +352,7 @@ def update(self, spec, document, upsert=False, manipulate=False,
         if not isinstance(upsert, bool):
             raise TypeError("upsert must be an instance of bool")
 
-        if upsert and manipulate:
+        if manipulate:
             document = self.__database._fix_incoming(document, self)
 
         if kwargs: