[simple-scan] Support saving files to FUSE file systems

[Bartosz <bkosiorek src gnome org>]

commit bf52c64e48a08e3803ffcccfe68749561ec8ad78
Author: Christian Weiske <cweiske cweiske de>
Date:   Tue Apr 14 22:18:11 2020 +0200

    Support saving files to FUSE file systems
    
    Resolves: https://gitlab.gnome.org/GNOME/simple-scan/-/issues/165

 src/app-window.vala | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)
---
diff --git a/src/app-window.vala b/src/app-window.vala
index 6f85796..7ff08ae 100644
--- a/src/app-window.vala
+++ b/src/app-window.vala
@@ -572,8 +572,8 @@ public class AppWindow : Gtk.ApplicationWindow
                 settings.set_string ("save-format", mime_type);
             }
 
-            var path = save_dialog.get_filename ();
-            var filename = Path.get_basename (path);
+            var uri = save_dialog.get_uri ();
+            var filename = Path.get_basename (uri);
 
             /* Replace extension */
             var extension_index = filename.last_index_of_char ('.');
@@ -600,14 +600,11 @@ public class AppWindow : Gtk.ApplicationWindow
             if (file_type_combo.get_active_iter (out i))
                 file_type_store.get (i, 1, out mime_type, -1);
 
-            var path = save_dialog.get_filename ();
-            var filename = Path.get_basename (path);
+            var uri = save_dialog.get_uri ();
 
-            var extension_index = filename.last_index_of_char ('.');
+            var extension_index = uri.last_index_of_char ('.');
             if (extension_index < 0)
-                path += "." + mime_type_to_extension (mime_type);
-
-            var uri = File.new_for_path (path).get_uri ();
+                uri += "." + mime_type_to_extension (mime_type);
 
             /* Check the file(s) don't already exist */
             var files = new List<File> ();