[gcompris] Bugfix: Play the audio level number now works with level > 9

[Bruno Coudoin <bcoudoin src gnome org>]

commit 1dd7029c21a197fff4461e2b302a2a9ca282cc74
Author: GunChleoc <fios foramnagaidhlig net>
Date:   Fri May 17 11:11:10 2013 +0100

    Bugfix: Play the audio level number now works with level > 9

 src/gcompris/bar.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/src/gcompris/bar.c b/src/gcompris/bar.c
index 45a545a..be6c95c 100644
--- a/src/gcompris/bar.c
+++ b/src/gcompris/bar.c
@@ -595,6 +595,12 @@ gc_bar_play_level_voice(int level)
       g_free(number_str);
       number_str = level_str;
     }
+  else
+    {
+      gchar *old_str = number_str;
+      number_str = g_strdup_printf("%s.ogg", old_str);
+      g_free(old_str);
+    }
 
   gchar *audio_str = g_strdup_printf("voices/$LOCALE/alphabet/%s", number_str);