Don't skip frame if there's a manual change coming

This fix the "redrawn" bug in Panzer Dragoon Zwei and maybe
all other games where frameskip was broken with software
renderer.

git-svn-id: https://yabause.svn.sourceforge.net/svnroot/yabause/trunk@3062 d7be59e3-070e-4b9a-85a1-4646befae34d