Fixes yet another case where the viewport background wasn't painted black when the desktop size was less than the viewport size.  Also set both scrollbar policies just as a precaution.

git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@5049 3789f03b-4d11-0410-bbf8-ca57d06f2519
1 file changed