[gnome-boxes/release-gnome-3-36-2: 9/10] util-app: Account for Medias without URLs in serilize_os_title

[Felipe Borges <felipeborges src gnome org>]

commit d74f61ca827baf21474bdddced646773bfae933b
Author: Felipe Borges <felipeborges gnome org>
Date:   Thu Mar 26 12:59:33 2020 +0100

    util-app: Account for Medias without URLs in serilize_os_title
    
    RHEL doesn't ship a direct URL, but a custom authentication dialog
    instead.

 src/util-app.vala | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/src/util-app.vala b/src/util-app.vala
index 0aa4af98..a41f28bd 100644
--- a/src/util-app.vala
+++ b/src/util-app.vala
@@ -133,9 +133,10 @@ else if ((media.os as Osinfo.Product).name != null) {
             if (media.url != null && media.url.contains ("server"))
                 variant += " Server";
         } else {
-            var file = File.new_for_uri (media.url);
-
-            title = file.get_basename ().replace ("_", "");
+            if (media.url != null) {
+                var file = File.new_for_uri (media.url);
+                title = file.get_basename ().replace ("_", "");
+            }
         }
 
         var subvariant = "";