2008-12-15  Morten Welinder  <terra@gnome.org>

	* src/gnm-datetime.c (gnm_datetime_allow_negative): New function.
	(datetime_value_to_serial_raw): Err on negative date numbers
	unless goffice supports them.

2008-12-15  Morten Welinder  <terra@gnome.org>

	* functions.c (gnumeric_unix2date): check for overflow.
	(float_to_secs): Handle negative values.  Range check arguments.


svn path=/trunk/; revision=17024