remove a couple shadow warnings

Database/MongoDB/Connection.hs

@@ -156,10 +156,10 @@ newConnection mos (ReplicaSet vHosts) = throwLeft . liftIO $ left (userError . s
 		Left (fs, is) -> if null is
 			then return (Left fs)
 			else do
-				replicas <- sortedReplicas (head is)
-				writeIORef vHosts replicas
+				reps <- sortedReplicas (head is)
+				writeIORef vHosts reps
 				-- try again in case new replicas in info
-				(fst +++ fst) <$> connectFirst mos replicas
+				(fst +++ fst) <$> connectFirst mos reps
 
 connectFirst :: MasterOrSlaveOk -> [Host] -> IO (Either ([(Host, IOError)], [ReplicaInfo]) (Connection, ReplicaInfo))
 -- ^ Connect to first host that succeeds and is master/slave, otherwise return list of failed connections plus info of connections that succeeded but were not master/slave.

Database/MongoDB/Query.hs

@@ -364,8 +364,8 @@ runQuery :: (DbConn m) => Bool -> [Notice] -> Query -> m CursorState'
 -- ^ Send query request and return cursor state
 runQuery isExplain ns q = do
 	db <- thisDatabase
-	slaveOk <- context
-	call' ns (queryRequest isExplain slaveOk q db)
+	slaveOK <- context
+	call' ns (queryRequest isExplain slaveOK q db)
 
 find :: (DbConn m) => Query -> m Cursor
 -- ^ Fetch documents satisfying query