[gnome-control-center] Thunderbolt: make BoltError enum a typedef

[Robert Ancell <rancell src gnome org>]

commit 901ef8b0ff2b05692cbaa119097f70615ea77ed4
Author: Mike Gorse <mgorse suse com>
Date:   Thu Jan 9 21:34:12 2020 +0000

    Thunderbolt: make BoltError enum a typedef
    
    Fixes error when compiled with -fno-common

 panels/thunderbolt/bolt-error.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/panels/thunderbolt/bolt-error.h b/panels/thunderbolt/bolt-error.h
index 39b3eee98..7d3823d35 100644
--- a/panels/thunderbolt/bolt-error.h
+++ b/panels/thunderbolt/bolt-error.h
@@ -31,7 +31,7 @@ G_BEGIN_DECLS
  *
  * Error codes used inside Bolt.
  */
-enum {
+typedef enum {
   BOLT_ERROR_FAILED = 0,
   BOLT_ERROR_UDEV,
   BOLT_ERROR_NOKEY,