Merge pull request #1 from fegu/fegu-patch-1

FSNotify alredy uses WatchModeOS for supported platforms. Current code fails to compile on BSD. This fixes the problem with no ill effects for other platforms.

src/Diagrams/Backend/CmdLine.hs

@@ -592,7 +592,7 @@ defaultLoopRender opts = when (opts ^. loop) $ do
       newProg     = newProgName (takeFileName srcPath) prog
       timeOfDay   = take 8 . drop 11 . show . eventTime
 
-  withManagerConf defaultConfig { confWatchMode = WatchModeOS } $
+  withManagerConf defaultConfig $
     \mgr -> do
       lock <- newIORef False