[gtk/gtk-3-24: 2/2] Merge branch 'mkenums-once-3-24' into 'gtk-3-24'

[Matthias Clasen <matthiasc src gnome org>]

commit 9b3ac9c9467e2573048ec8edc65848295e02b8cf
Merge: 2881d6d978 b565f5d5c2
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 27 09:30:32 2019 +0000

    Merge branch 'mkenums-once-3-24' into 'gtk-3-24'
    
    Use g_once for all the mkenums template files
    
    See merge request GNOME/gtk!866

 gdk/gdkenumtypes.c.template           | 21 +++++++++++++--------
 gtk/gtkprivatetypebuiltins.c.template | 21 +++++++++++++--------
 gtk/gtktypebuiltins.c.template        | 21 +++++++++++++--------
 3 files changed, 39 insertions(+), 24 deletions(-)
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