[retro-gtk] core-descriptor: Fix throwing a private error

[Adrien Plazas <aplazas src gnome org>]

commit 9570ce089f5bdaf91d9f76d3b922c82af2671faa
Author: Adrien Plazas <kekun plazas laposte net>
Date:   Fri Jul 21 15:03:58 2017 +0200

    core-descriptor: Fix throwing a private error

 retro-gtk/retro-core-descriptor.vala |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/retro-gtk/retro-core-descriptor.vala b/retro-gtk/retro-core-descriptor.vala
index 33e951a..a78e380 100644
--- a/retro-gtk/retro-core-descriptor.vala
+++ b/retro-gtk/retro-core-descriptor.vala
@@ -36,7 +36,7 @@ public class Retro.CoreDescriptor : Object {
        private string filename;
        private KeyFile key_file;
 
-       public CoreDescriptor (string filename) throws CoreDescriptorError, KeyFileError, FileError {
+       public CoreDescriptor (string filename) throws Error, KeyFileError, FileError {
                this.filename = filename;
                key_file = new KeyFile ();
                key_file.load_from_file (filename, KeyFileFlags.NONE);