fixup! reset.c: enable fscache

The recent speedup to `git reset` sadly broke things, as the cached stat
data is no longer accurate after writing the file(s). And that is exactly
what `git reset` does: writing the file(s).

This patch is identical to the one provided in
#1445 but added a bit more
detailed information, as well as marking it as a fixup so that the next
merging-rebase will drop the patch altogether.

This fixes #1437 and
#1440.

Signed-off-by: Johannes Schindelin <[email protected]>

builtin/reset.c

@@ -52,7 +52,6 @@ static int reset_index(const struct object_id *oid, int reset_type, int quiet)
 	struct tree *tree;
 	struct unpack_trees_options opts;
 	int ret = -1;
-	int unpack_result;
 
 	memset(&opts, 0, sizeof(opts));
 	opts.head_idx = 1;
@@ -92,11 +91,7 @@ static int reset_index(const struct object_id *oid, int reset_type, int quiet)
 	}
 	nr++;
 
-	enable_fscache(1);
-	unpack_result = unpack_trees(nr, desc, &opts);
-	enable_fscache(0);
-
-	if (unpack_result)
+	if (unpack_trees(nr, desc, &opts))
 		goto out;
 
 	if (reset_type == MIXED || reset_type == HARD) {