[gtk/gtk-3-24: 13/20] Replace deprecated gestalt for 10.10 and later.

[John Ralls <jralls src gnome org>]

commit 1165ab9d27574445489b21ed9beb4b8a7f872907
Author: John Ralls <jralls ceridwen us>
Date:   Fri Nov 23 10:23:02 2018 +0900

    Replace deprecated gestalt for 10.10 and later.
    
    It was deprecated in 10.8 but no replacement until 10.10.

 gdk/quartz/gdkglobals-quartz.c | 7 +++++++
 1 file changed, 7 insertions(+)
---
diff --git a/gdk/quartz/gdkglobals-quartz.c b/gdk/quartz/gdkglobals-quartz.c
index efcf73c391..81cd4632e8 100644
--- a/gdk/quartz/gdkglobals-quartz.c
+++ b/gdk/quartz/gdkglobals-quartz.c
@@ -32,9 +32,16 @@ gdk_quartz_osx_version (void)
 
   if (minor == GDK_OSX_UNSUPPORTED)
     {
+#if MAC_OS_X_VERSION_MIN_REQUIRED < 101000
       OSErr err = Gestalt (gestaltSystemVersionMinor, (SInt32*)&minor);
 
       g_return_val_if_fail (err == noErr, GDK_OSX_UNSUPPORTED);
+#else
+      NSOperatingSystemVersion version;
+
+      version = [[NSProcessInfo processInfo] operatingSystemVersion];
+      minor = version.minorVersion;
+#endif
     }
 
   if (minor < GDK_OSX_MIN)