[gtk] filechoosernativewin32: Add missing break statement

[Benjamin Otte <otte src gnome org>]

commit 90870194ff132064a3d35438589385be94baf816
Author: Benjamin Otte <otte redhat com>
Date:   Sat Jan 26 15:37:05 2019 +0100

    filechoosernativewin32: Add missing break statement

 gtk/gtkfilechoosernativewin32.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkfilechoosernativewin32.c b/gtk/gtkfilechoosernativewin32.c
index c5d29275fa..eb1dc1b5a5 100644
--- a/gtk/gtkfilechoosernativewin32.c
+++ b/gtk/gtkfilechoosernativewin32.c
@@ -707,6 +707,7 @@ translate_mnemonics (const char *src)
         case '&':
           /* Win32 needs ampersands escaped */
           g_string_append (s, "&&");
+          break;
         default:
           g_string_append_c (s, c);
         }