[gtk/gtk-3-24] Reset the Quartz resolution to 72.0 dpi.

[John Ralls <jralls src gnome org>]

commit bb376222c104aef0ec7e31b40959bc35eecf2253
Author: John Ralls <jralls ceridwen us>
Date:   Wed Nov 14 09:02:45 2018 +0900

    Reset the Quartz resolution to 72.0 dpi.
    
    Further feedback on https://bugzilla.gnome.org/show_bug.cgi?id=787867
    indicates that 96.0 dpi scales fonts 4/3 larger than native applications.

 gdk/quartz/gdkscreen-quartz.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gdk/quartz/gdkscreen-quartz.c b/gdk/quartz/gdkscreen-quartz.c
index f1feaed30e..cea9c4cba7 100644
--- a/gdk/quartz/gdkscreen-quartz.c
+++ b/gdk/quartz/gdkscreen-quartz.c
@@ -67,7 +67,7 @@ static void  gdk_quartz_screen_calculate_layout (GdkQuartzScreen *screen);
 static void display_reconfiguration_callback (CGDirectDisplayID            display,
                                               CGDisplayChangeSummaryFlags  flags,
                                               void                        *userInfo);
-static const double dpi = 96.0;
+static const double dpi = 72.0;
 static gint get_mm_from_pixels (NSScreen *screen, int pixels);
 
 G_DEFINE_TYPE (GdkQuartzScreen, gdk_quartz_screen, GDK_TYPE_SCREEN);