[gtk/issue-302] docs: Fix the override for GdkAtom

[Emmanuele Bassi <ebassi src gnome org>]

commit ac490ee8a4680f2fd754b3ff2103c0e528bf44c4
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue May 21 14:27:33 2019 +0100

    docs: Fix the override for GdkAtom
    
    GdkAtom is a typedef to a pointer to an opaque structure. We need to
    tell GTK-Doc how to override it, so that the documentation is accurate.
    
    Fixes: #302

 docs/reference/gdk/gdk3-overrides.txt | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
---
diff --git a/docs/reference/gdk/gdk3-overrides.txt b/docs/reference/gdk/gdk3-overrides.txt
index 3ffff9ccd8..77dd4d07be 100644
--- a/docs/reference/gdk/gdk3-overrides.txt
+++ b/docs/reference/gdk/gdk3-overrides.txt
@@ -1,8 +1,9 @@
 
 # GdkAtom is an opaque typedef
-<STRUCT>
+<TYPEDEF>
 <NAME>GdkAtom</NAME>
-</STRUCT>
+typedef struct _GdkAtom *GdkAtom;
+</TYPEDEF>
 
 <MACRO>
 <NAME>GDK_WINDOWING_X11</NAME>