mono/mono — pull request #426 by knittl (2012-08-14 07:41:21+00:00)
Title: Return at least MinimumWidth instead of 0 in GetPreferredWidth

Otherwise we cannot use GetPreferredWidth as new Width, since this will
throw an Exception (ArgumentOutOfRange).
It's not a real fix, but it avoids crashes when using this method to
assign a new width for columns. Attached a MonoTODO to make this clear.

Signed-off-by: Daniel Knittl-Frank