Another fix to endcodes handling.

If I understand how endcodes are implemented in software renderer,
I have no idea why it was working... so it may be I didn't understand
how it works and I just broke everything...

This fix the "missing lines" in Shining Force 3 sprites.

git-svn-id: https://yabause.svn.sourceforge.net/svnroot/yabause/trunk@3076 d7be59e3-070e-4b9a-85a1-4646befae34d