[gnome-boxes] wizard: scheme part is mandatory in URI

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 14c562406cc86f820f96ef8c73f350a56b978131
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Fri Apr 19 23:45:14 2013 +0300

    wizard: scheme part is mandatory in URI
    
    By catching bogus URIs like 'rd' early, we avoid showing weird errors
    like "Unsupported protocol '(null)'" in the UI and also many
    criticals/warnings on the console.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=698338

 src/wizard.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/wizard.vala b/src/wizard.vala
index 07cd380..f9fbbd8 100644
--- a/src/wizard.vala
+++ b/src/wizard.vala
@@ -247,7 +247,7 @@ private class Boxes.Wizard: Boxes.UI {
     private void prepare_for_uri (string uri_as_text) throws Boxes.Error {
         var uri = Xml.URI.parse (uri_as_text);
 
-        if (uri == null)
+        if (uri == null || uri.scheme == null)
             throw new Boxes.Error.INVALID (_("Invalid URI"));
 
         source = new CollectionSource (uri.server ?? uri_as_text, uri.scheme, uri_as_text);