gnucash maint: Catch more exceptions in gnc_numeric_convert

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/8e418570 (commit)
	from  https://github.com/Gnucash/gnucash/commit/04d4038e (commit)



commit 8e418570141083956fb534165a2ec543754bc985
Author: John Ralls <jralls at ceridwen.us>
Date:   Fri Mar 12 13:42:39 2021 -0800

    Catch more exceptions in gnc_numeric_convert
    
    To enable fixing https://bugs.gnucash.org/show_bug.cgi?id=798132.



Summary of changes:
 libgnucash/engine/gnc-numeric.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)