[ostree] core: Don't call unlink() on directory if it already exists

[Colin Walters <walters src gnome org>]

commit 83fb6d56e1e57b20f0f1c24bcaa0d02abcb02cca
Author: Colin Walters <walters verbum org>
Date:   Tue Mar 6 11:33:42 2012 -0500

    core: Don't call unlink() on directory if it already exists
    
    If we fail to make a directory because it exists, we shouldn't call
    unlink() on it.

 src/libostree/ostree-core.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/libostree/ostree-core.c b/src/libostree/ostree-core.c
index 3fe6d22..8a4cb1f 100644
--- a/src/libostree/ostree-core.c
+++ b/src/libostree/ostree-core.c
@@ -839,8 +839,10 @@ ostree_create_file_from_input (GFile            *dest_file,
   ret = TRUE;
   ot_transfer_out_value(out_checksum, &ret_checksum);
  out:
-  if (!ret)
-    (void) unlink (dest_path);
+  if (!ret && !S_ISDIR(mode))
+    {
+      (void) unlink (dest_path);
+    }
   ot_clear_checksum (&ret_checksum);
   g_clear_object (&out);
   return ret;