Poccil Map Zoom

[DerVVulfman]

BUMP
To version 1.1

Thanks to Mel, a minor bug that affected zoomed map tiling was discovered. That is, sprites did not properly become overlapped behind existing map tiles with higher priority values when zoomed. It was not an issue in earlier beta test runs, and only had its genesis within final stages of the script's preparation.

The issue was a simple bit of math that exists within the screen_z method of Game_Character. Now corrected, the issue with sprites versus tile priorities no longer exists.