[gtk-mac-integration] Set C locale when creating a menu item.

[John Ralls <jralls src gnome org>]

commit 9774a706d1d89abaaf3dfbd9522b28934cc29138
Author: John Ralls <jralls ceridwen us>
Date:   Sat Sep 18 13:11:02 2021 -0700

    Set C locale when creating a menu item.
    
    Works around macOS bug described in https://gitlab.gnome.org/GNOME/gtk-mac-integration/-/issues/14.

 src/GNSMenuItem.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/GNSMenuItem.c b/src/GNSMenuItem.c
index 48ec0d1..81d2547 100644
--- a/src/GNSMenuItem.c
+++ b/src/GNSMenuItem.c
@@ -44,6 +44,7 @@ idle_call_activate (ClosureData *action)
 
   /* All menu items have the action "activate", which will be handled by this child class
    */
+  const char* locale = setlocale(LC_NUMERIC, "C");
   self = [ super initWithTitle: title action: @selector (activate: ) keyEquivalent: @"" ];
 
   if (self)
@@ -58,6 +59,7 @@ idle_call_activate (ClosureData *action)
       notUsed = NO;
       g_weak_ref_set (&menuItem, GTK_MENU_ITEM (gtkmenuitem));
     }
+  setlocale(LC_NUMERIC, locale);
   return self;
 }