[Widelands-public] Erik's 'rendermap and overlay manager' patch

[Florian W. <Flo...@pf...>]

I just looked over this patch and I think it should be included quickly. No=
t=20
only does it fix a bug, it also improves rendering speed by (for me) about=
=20
10% when using a graphics-bound gamestate.

=2D-=20
With best regards,
=46lorian Weber

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