[gimp] Macro name change to GDK_OSX_BIGSUR

[Jehan <jehanp src gnome org>]

commit 5ff5d3898574bb346c8220e3ebde2edfea5a4b6a
Author: Lukas Oberhuber <lukaso gmail com>
Date:   Mon Oct 4 21:35:35 2021 +0100

    Macro name change to GDK_OSX_BIGSUR

 app/gui/gui.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/app/gui/gui.c b/app/gui/gui.c
index 67c301b791..fa0b6b8580 100644
--- a/app/gui/gui.c
+++ b/app/gui/gui.c
@@ -270,7 +270,7 @@ gui_init (Gimp     *gimp,
    * has the additional cost of an 8-bit (ARGB) to 10-bit conversion.
    * Let's disable this mode to regain the lost performance.
    */
-  if (gdk_quartz_osx_version () >= GDK_OSX_BIG_SUR)
+  if (gdk_quartz_osx_version () >= GDK_OSX_BIGSUR)
     {
       NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
       [userDefaults setBool: NO forKey:@"NSViewUsesAutomaticLayerBackingStores"];