[ostree] Fix double free in ostree_repo_pull_with_options

[Colin Walters <walters src gnome org>]

commit 4f6f97caf0efcded268d3f4ffa7774fe34ff203f
Author: John Hiesey <john hiesey com>
Date:   Wed May 6 16:43:06 2015 -0700

    Fix double free in ostree_repo_pull_with_options
    
    Duplicate the commit checksum for expected_commit_sizes since it's also
    used as a value in requested_refs_to_fetch.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750366

 src/libostree/ostree-repo-pull.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libostree/ostree-repo-pull.c b/src/libostree/ostree-repo-pull.c
index 608a7b4..cf576b5 100644
--- a/src/libostree/ostree-repo-pull.c
+++ b/src/libostree/ostree-repo-pull.c
@@ -2063,7 +2063,7 @@ ostree_repo_pull_with_options (OstreeRepo             *self,
 
           malloced_size = g_new0 (guint64, 1);
           *malloced_size = commit_size;
-          g_hash_table_insert (pull_data->expected_commit_sizes, contents, malloced_size);
+          g_hash_table_insert (pull_data->expected_commit_sizes, g_strdup (contents), malloced_size);
         }
       else
         {