2010-01-23 Carlos Alberto Cortez <calberto.cortez@gmail.com>

2010-01-23  Carlos Alberto Cortez <calberto.cortez@gmail.com>

	* StreamReader.cs: When detecting the encoding we usually check the
	four first bytes looking for either UTF32 or UTF8 BOM, since they share
	the first two bytes, but if we happen to have less than 4 bytes at
	detection time, just check for Unicode and use it as the current
	encoding - this is exactly what .Net does, and it is specially visible
	with NetworkStream.
	Fixes #534137.

svn path=/trunk/mcs/; revision=150090