gnucash maint: Bug 798133 - Gnucash crash when any custom action is entered

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/40e005d9 (commit)
	from  https://github.com/Gnucash/gnucash/commit/f7f35fae (commit)



commit 40e005d9630b3f317367ebb1193c06169050de5d
Author: John Ralls <jralls at ceridwen.us>
Date:   Tue Apr 20 10:22:05 2021 -0700

    Bug 798133 - Gnucash crash when any custom action is entered
    
    1. Protect strlen call in gnucash_sheet_modify_current_cell to
    prevent it from crashing.
    
    2. Handle NULL selection in gnc_item_list_key_event when key is
    GDK_KEY_Return so that new string in combo control is handled
    correctly.



Summary of changes:
 gnucash/register/register-gnome/gnucash-item-list.c | 2 ++
 gnucash/register/register-gnome/gnucash-sheet.c     | 5 +++--
 2 files changed, 5 insertions(+), 2 deletions(-)