on second thought, InodeCache should use getFileSize

This is necessary for interop between inode caches created on unix and
windows. Which is more important than supporting inodecaches for large keys
with the wrong size, which are broken anyway.

There should be no slowdown from this change, except on Windows.

Assistant/Threads/Watcher.hs

@@ -224,7 +224,7 @@ onAddDirect symlinkssupported matcher file fs = do
 	v <- liftAnnex $ catKeyFile file
 	case (v, fs) of
 		(Just key, Just filestatus) ->
-			ifM (liftAnnex $ sameFileStatus key filestatus)
+			ifM (liftAnnex $ sameFileStatus key file filestatus)
 				{- It's possible to get an add event for
 				 - an existing file that is not
 				 - really modified, but it might have