[gitg] Adapt to gtk+ binding changes with vala git/0.27

[Rico Tzschichholz <ricotz src gnome org>]

commit ac7eaa78673bd68822e6d08f97185d7eebc67cc6
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Nov 16 20:46:28 2014 +0100

    Adapt to gtk+ binding changes with vala git/0.27

 gitg/gitg-create-tag-dialog.vala |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/gitg/gitg-create-tag-dialog.vala b/gitg/gitg-create-tag-dialog.vala
index 92c45e9..9ab3b97 100644
--- a/gitg/gitg-create-tag-dialog.vala
+++ b/gitg/gitg-create-tag-dialog.vala
@@ -102,7 +102,11 @@ class CreateTagDialog : Gtk.Dialog
 
                if (start.compare(end) == 0 && !d_text_view_message.has_focus)
                {
+#if VALA_0_28
+                       buf.insert_with_tags(ref start,
+#else
                        buf.insert_with_tags(start,
+#endif
                                             _("Provide a message to create an annotated tag"),
                                             -1,
                                             d_info_tag);