[vte] vteapp: Warn when parsing the colour failed

[Christian Persch <chpe src gnome org>]

commit 4f7052edbe4d697d77c5f5fa8e0838f49374120f
Author: Christian Persch <chpe gnome org>
Date:   Mon Apr 14 19:21:42 2014 +0200

    vteapp: Warn when parsing the colour failed

 src/app.vala |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/app.vala b/src/app.vala
index 7542cb1..1693354 100644
--- a/src/app.vala
+++ b/src/app.vala
@@ -645,8 +645,10 @@ class App : Gtk.Application
                        if (str == null)
                                return null;
                        var color = Gdk.RGBA();
-                       if (!color.parse(str))
+                       if (!color.parse(str)) {
+                               printerr("Failed to parse \"%s\" as color.\n", str);
                                return null;
+                       }
                        return color;
                }