[libgxps] archive: Check for pathname being NULL before dereferencing

[Tobias Mueller <tobiasmue src gnome org>]

commit 9d5d292055250ed298f3b89dc332d6db4003a031
Author: Marek Kasik <mkasik redhat com>
Date:   Wed Jul 26 16:23:37 2017 +0200

    archive: Check for pathname being NULL before dereferencing
    
    Check whether "archive_entry_pathname ()" returns a non-NULL pathname
    before using it to avoid a NULL pointer being dereferenced.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=785479

 libgxps/gxps-archive.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/libgxps/gxps-archive.c b/libgxps/gxps-archive.c
index acf8d7d..e763773 100644
--- a/libgxps/gxps-archive.c
+++ b/libgxps/gxps-archive.c
@@ -257,6 +257,7 @@ gxps_archive_initable_init (GInitable     *initable,
        GXPSArchive          *archive;
        ZipArchive           *zip;
        struct archive_entry *entry;
+       const gchar          *pathname;
 
        archive = GXPS_ARCHIVE (initable);
 
@@ -281,7 +282,9 @@ gxps_archive_initable_init (GInitable     *initable,
 
         while (gxps_zip_archive_iter_next (zip, &entry)) {
                 /* FIXME: We can ignore directories here */
-                g_hash_table_add (archive->entries, g_strdup (archive_entry_pathname (entry)));
+                pathname = archive_entry_pathname (entry);
+                if (pathname != NULL)
+                        g_hash_table_add (archive->entries, g_strdup (pathname));
                 archive_read_data_skip (zip->archive);
         }