[gtk/gtk-4-4] gtktextview: Fixed arrow key crash.

[Matthias Clasen <matthiasc src gnome org>]

commit cc5a7b153db3a478b3642b89b89e9a0ce76a7d72
Author: Jordan Yelloz <jordan yelloz me>
Date:   Tue Sep 21 08:47:32 2021 -0700

    gtktextview: Fixed arrow key crash.
    
    When pressing the keyboard arrows to move around when the insertion point is
    hidden, it causes an assertion error in blink_cb.
    
    Insertion point blinks should only be scheduled when blinking is enabled and the
    insertion point is visible.
    
    Closes #4275

 gtk/gtktextview.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtktextview.c b/gtk/gtktextview.c
index 4bd918fbcf..e58e3c5c02 100644
--- a/gtk/gtktextview.c
+++ b/gtk/gtktextview.c
@@ -6200,7 +6200,7 @@ gtk_text_view_check_cursor_blink (GtkTextView *text_view)
 static void
 gtk_text_view_pend_cursor_blink (GtkTextView *text_view)
 {
-  if (cursor_blinks (text_view))
+  if (cursor_blinks (text_view) && cursor_visible (text_view))
     {
       remove_blink_timeout (text_view);
       add_blink_timeout (text_view, TRUE);