* TimeSpan.cs: When parsing ticks, we used to only parse

	* TimeSpan.cs: When parsing ticks, we used to only parse
	the first 7 digits, and more than that would cause a FormatException -
	starting in 4.0 we need to throw an OverflowException, however. Also,
	for hours/minutes/seconds, two or more preceding zeroes will cause an
	OverflowException as well.

2010-03-22  Carlos Alberto Cortez <calberto.cortez@gmail.com>

svn path=/trunk/mcs/; revision=154033