Resend viewport on render target change.

The viewport is reset upon SetRenderTarget, so make sure to do SetViewport again.

BUG=
TEST=

Review URL: http://codereview.appspot.com/5334048

git-svn-id: http://angleproject.googlecode.com/svn/trunk@812 736b8ea6-26fd-11df-bfd4-992fa37f6226
1 file changed