[valadoc] libvaladoc: Fix deprecation warning

[Rico Tzschichholz <ricotz src gnome org>]

commit d3b0d46cc72b17a6159e3274afb03322a1300bef
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Jun 14 08:50:50 2013 +0200

    libvaladoc: Fix deprecation warning

 src/libvaladoc/markupreader.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/libvaladoc/markupreader.vala b/src/libvaladoc/markupreader.vala
index 9752bf9..4791c89 100644
--- a/src/libvaladoc/markupreader.vala
+++ b/src/libvaladoc/markupreader.vala
@@ -65,7 +65,7 @@ public class Valadoc.MarkupReader : Object {
 
                lines = content.split ("\n");
                begin = content;
-               end = begin + content.size ();
+               end = begin + content.length;
                current = begin;
 
                column = 1;