[gnome-autoar] AutoarExtract: Prevent priv->size == 0

[Ting-Wei Lan <lantw src gnome org>]

commit 6a64f5221d66a1499bf8df39a283fef7522621aa
Author: Ting-Wei Lan <lantw44 gmail com>
Date:   Sun Oct 13 21:47:10 2013 +0800

    AutoarExtract: Prevent priv->size == 0
    
    This prevent "progress" signal from dividing number by zero.

 gnome-autoar/autoar-extract.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gnome-autoar/autoar-extract.c b/gnome-autoar/autoar-extract.c
index 315c855..faf8f39 100644
--- a/gnome-autoar/autoar-extract.c
+++ b/gnome-autoar/autoar-extract.c
@@ -1814,6 +1814,11 @@ autoar_extract_step_scan_toplevel (AutoarExtract *arextract)
     return;
   }
 
+  /* If we are unable to determine the total size, set it to a positive
+   * number to prevent strange percentage. */
+  if (priv->size <= 0)
+    priv->size = G_MAXUINT64;
+
   g_free (pathname_prefix);
   archive_read_free (a);