[gtk/gtk-3-24] Fix copy-paste error.

[John Ralls <jralls src gnome org>]

commit e105fefc4923ebd035747daa7d453243eba4a836
Author: John Ralls <jralls ceridwen us>
Date:   Tue Dec 18 09:07:15 2018 -0800

    Fix copy-paste error.

 gdk/quartz/GdkQuartzNSWindow.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gdk/quartz/GdkQuartzNSWindow.c b/gdk/quartz/GdkQuartzNSWindow.c
index f392a71f81..89f42e771b 100644
--- a/gdk/quartz/GdkQuartzNSWindow.c
+++ b/gdk/quartz/GdkQuartzNSWindow.c
@@ -405,7 +405,7 @@
 #if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400
   if (gdk_quartz_osx_version () >= GDK_OSX_MOJAVE)
     {
-      return [super convertPointToScreen: point];
+      return [super convertPointFromScreen: point];
     }
 #endif
   if (gdk_quartz_osx_version () >= GDK_OSX_LION)