fix missing call to check after hard linking

This could perhaps have caused a hard link to be made when the content
of the object was modified. I don't think that actually happened,
because the annexed file would have to be unlocked, with annex.thin, for
the object to get modified, and in that case, a hard link is not made.
However, to be sure, run the check.

Note that it seemed best to run the check only once, although the
current implementation is fast and safe to run repeatedly.

Remote/Git.hs

@@ -884,7 +884,10 @@ mkCopier remotewanthardlink st rsyncparams = do
 	if remotewanthardlink || localwanthardlink
 		then return $ \src dest p check ->
 			ifM (liftIO (catchBoolIO (linker src dest)))
-				( return (True, Verified)
+				( ifM check
+					( return (True, Verified)
+					, return (False, UnVerified)
+					)
 				, copier src dest p check
 				)
 		else return copier