[file-roller] new archive dialog: use the tar.gz format if no extension if specified

[Paolo Bacchilega <paobac src gnome org>]

commit 7aac396833f9adeade8cb55e6a006bcef7b3e26d
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Tue Aug 7 10:43:42 2012 +0200

    new archive dialog: use the tar.gz format if no extension if specified

 src/fr-new-archive-dialog.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/src/fr-new-archive-dialog.c b/src/fr-new-archive-dialog.c
index 8ab3bd6..5991b52 100644
--- a/src/fr-new-archive-dialog.c
+++ b/src/fr-new-archive-dialog.c
@@ -171,6 +171,8 @@ _fr_new_archive_dialog_get_format (FrNewArchiveDialog *self,
 		/* get the format from the extension */
 
 		ext = _g_filename_get_extension (uri);
+		if (ext == NULL)
+			ext = DEFAULT_EXTENSION;
 		idx = GPOINTER_TO_INT (g_hash_table_lookup (self->priv->supported_ext, ext)) - 1;
 	}