[latexila] Fix error with latest gtk+-3.0.vapi

[Sébastien Wilmet <swilmet src gnome org>]

commit 6c7268bfb4f0e854a51e73420ee5b7248df750d2
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat Sep 20 15:25:03 2014 +0200

    Fix error with latest gtk+-3.0.vapi

 configure.ac      |    2 +-
 src/latexila.vala |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 100d871..1d36f00 100644
--- a/configure.ac
+++ b/configure.ac
@@ -29,7 +29,7 @@ GLIB_REQUIRED_VERSION="2.40"
 GTK_REQUIRED_VERSION="3.6"
 GTKSOURCEVIEW_REQUIRED_VERSION="3.10"
 GTKSPELL_REQUIRED_VERSION="3.0.4"
-VALA_REQUIRED_VERSION="0.20.0"
+VALA_REQUIRED_VERSION="0.25.4"
 GEE_REQUIRED_VERSION="0.10"
 
 AC_SUBST([GLIB_REQUIRED_VERSION])
diff --git a/src/latexila.vala b/src/latexila.vala
index 9704adc..fc42a6b 100644
--- a/src/latexila.vala
+++ b/src/latexila.vala
@@ -136,7 +136,7 @@ public class Latexila : Gtk.Application
             }
         }
 
-        Gtk.Window.set_default_icon_list (list);
+        Gtk.Window.set_default_icon_list ((owned) list);
     }
 
     private void reopen_files ()