Don't call xwidget functions until GTK has been initialized

Follow up fix to Bug#33294.

* src/gtkutil.c: Define xg_gtk_initialized.
(xg_initialize): Set it when GTK has finished initializing.

* src/gtkutil.h: Declare xg_gtk_initialized.

* src/xwidget.c (Fmake_xwidget): Error out if GTK has not been
initialized.
(xwidget_init_view): Likewise.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/gtkutil.h b/src/gtkutil.h
index 7dcd549f5c0..3b074073e44 100644
--- a/src/gtkutil.h
+++ b/src/gtkutil.h
@@ -202,5 +202,6 @@ extern void xg_initialize (void);
    to indicate that the callback should do nothing.  */
 extern bool xg_ignore_gtk_scrollbar;
 
+extern bool xg_gtk_initialized;
 #endif /* USE_GTK */
 #endif /* GTKUTIL_H */