[vala] glib-2.0: set default value of StringBuilder.truncate to 0

[Evan Nemerson <evann src gnome org>]

commit 67e2f786527f8ccbecf9d83f0ba7c5856e2efbcd
Author: Evan Nemerson <evan coeus-group com>
Date:   Fri Apr 30 21:36:17 2010 -0700

    glib-2.0: set default value of StringBuilder.truncate to 0

 vapi/glib-2.0.vapi |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/vapi/glib-2.0.vapi b/vapi/glib-2.0.vapi
index fb2aa4c..ffd6c4f 100644
--- a/vapi/glib-2.0.vapi
+++ b/vapi/glib-2.0.vapi
@@ -3444,7 +3444,7 @@ namespace GLib {
 		public unowned StringBuilder prepend_len (string val, ssize_t len);
 		public unowned StringBuilder insert (ssize_t pos, string val);
 		public unowned StringBuilder erase (ssize_t pos = 0, ssize_t len = -1);
-		public unowned StringBuilder truncate (size_t len);
+		public unowned StringBuilder truncate (size_t len = 0);
 
 		[PrintfFormat]
 		public void printf (string format, ...);