gnome3: Propagate GError messages to pinentry.
* gnome3/pinentry-gnome3.c (_propagate_g_error_to_pinentry): New. Send GError messages back out to pinentry error reporting. (create_prompt): Use _propagate_g_error_to_pinentry on error. (gnome3_cmd_handler): Use _propagate_g_error_to_pinentry on error.
Modified to take care of malloc failure. Also fixed alignment of some
old comments.
- Signed-off-by: Werner Koch <wk@gnupg.org>