[glib/glib-2-58: 1/3] grefcount: add missing gatomic.h

[Simon McVittie <smcv src gnome org>]

commit 57efb14f0519e0b20a789c274db7777f16c98b35
Author: Fabrice Fontaine <fontaine fabrice gmail com>
Date:   Sat Oct 13 23:10:33 2018 +0200

    grefcount: add missing gatomic.h
    
    Without gatomic.h, build fails on:
    In file included from garcbox.c:24:0:
    garcbox.c: In function ‘g_atomic_rc_box_acquire’:
    grefcount.h:101:13: error: implicit declaration of function ‘g_atomic_int_get’; did you mean 
‘__atomic_store’? [-Werror=implicit-function-declaration]
         (void) (g_atomic_int_get (rc) == G_MAXINT ? 0 : g_atomic_int_inc ((rc))); \
                 ^
    garcbox.c:292:3: note: in expansion of macro ‘g_atomic_ref_count_inc’
       g_atomic_ref_count_inc (&real_box->ref_count);
    
    Signed-off-by: Fabrice Fontaine <fontaine fabrice gmail com>

 glib/grefcount.h | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/glib/grefcount.h b/glib/grefcount.h
index dec9a5ffb..b6eced1b7 100644
--- a/glib/grefcount.h
+++ b/glib/grefcount.h
@@ -23,6 +23,7 @@
 #error "Only <glib.h> can be included directly."
 #endif
 
+#include <glib/gatomic.h>
 #include <glib/gtypes.h>
 
 G_BEGIN_DECLS