gnucash master: Fix Windows crash when the TZ has no Daylight time.

[John Ralls]

Updated	 via  https://github.com/Gnucash/gnucash/commit/dd60ce69 (commit)
	from  https://github.com/Gnucash/gnucash/commit/c7f84432 (commit)



commit dd60ce6904af8d2f88f9b1563afd264fba148a92
Author: John Ralls <jralls at ceridwen.us>
Date:   Mon Jul 27 22:53:03 2015 +0000

    Fix Windows crash when the TZ has no Daylight time.



Summary of changes:
 src/libqof/qof/gnc-timezone.cpp | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)