Make GtkEntry work harder to protect passwords: (#143955, Morten Welinder)

Make GtkEntry work harder to protect passwords: (#143955, Morten Welinder)

2004-07-09  Matthias Clasen  <mclasen@redhat.com>

 	Make GtkEntry work harder to protect passwords:  (#143955,
	Morten Welinder)

	* gtk/gtkentry.c (gtk_entry_destroy): Add a destroy handler
	to clear the password even if the widget is leaked.

	* gtk/gtkentry.c (gtk_entry_real_delete_text):
	* gtk/gtkentry.c (gtk_entry_finalize): Zero out the memory
	before freeing it.

	* gtk/gtkentry.c (gtk_entry_real_insert_text): Zero and free
	the old memory instead of just reallocating it.

	* gtk/gtkentry.c (gtk_entry_create_layout): Don't leak text
	direction information for passwords.