Window support for rotation screens in vidsoft.

Yeah... windows were not tested in rotation screens...
it's fixed :)

This fix the "garbage on bottom and top" in Shining Force 3
and the missing black bands in Panzer Dragoon Zwei.

git-svn-id: https://yabause.svn.sourceforge.net/svnroot/yabause/trunk@3077 d7be59e3-070e-4b9a-85a1-4646befae34d