gnucash master: Use the right value to determine if the zone has a daylight time.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/c11185e9 (commit)
	from  https://github.com/Gnucash/gnucash/commit/43a7cd09 (commit)



commit c11185e929bb920107daf6bb7daa1c62b53dcd4a
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Jul 11 01:26:01 2016 +0000

    Use the right value to determine if the zone has a daylight time.
    
    It's not Daylight offset.
    Also catch the now much less likely exception.



Summary of changes:
 src/libqof/qof/gnc-timezone.cpp | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)