[vte] lib: ABI repairs

[Christian Persch <chpe src gnome org>]

commit 73a029f06ceb67d3422a1c80a16602ada3ca0009
Author: Christian Persch <chpe src gnome org>
Date:   Sun Sep 26 19:12:57 2021 +0200

    lib: ABI repairs

 src/vte/vteterminal.h | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)
---
diff --git a/src/vte/vteterminal.h b/src/vte/vteterminal.h
index b59f55f5..c017c101 100644
--- a/src/vte/vteterminal.h
+++ b/src/vte/vteterminal.h
@@ -109,8 +109,20 @@ struct _VteTerminalClass {
 
        void (*bell)(VteTerminal* terminal);
 
+#if _VTE_GTK == 3
+        /* Compatibility padding due to fedora patches intruding on our ABI */
+        /*< private >*/
+        gpointer _extra_padding[3];
+#endif /* _VTE_GTK == 3 */
+
+        /* Add new vfuncs here, and subtract from the padding below. */
+
         /* Padding for future expansion. */
-        gpointer padding[16];
+#if _VTE_GTK == 3
+        gpointer _padding[13];
+#elif _VTE_GTK == 4
+        gpointer _padding[16];
+#endif /* _VTE_GTK */
 
 // FIXMEgtk4 use class private data instead
         VteTerminalClassPrivate *priv;