[add mfilterWithKey
John Meacham <john@repetae.net>**20080219151259] hunk ./Util/SetLike.hs 154
+    mfilterWithKey :: (k -> v -> Bool) -> m -> m
hunk ./Util/SetLike.hs 156
+
hunk ./Util/SetLike.hs 170
+    mfilterWithKey = IM.filterWithKey
hunk ./Util/SetLike.hs 181
+    mfilterWithKey = M.filterWithKey