[Freeciv-Dev] (PR#4381) some clean with get_map_tile(...) , get_map_terrain(...), get_map_special(...) ...

["Guest" <rt-guest@xxxxxxxxxxxxxx>]

Hi All 

This is my last version of this code...
Per please test timing of this code, if timings will be bad I scrap this
project.

Current I made secound versions of :
iterate_outward(...), square_dxy_iterate(...), square_iterate(...) and
adjc_iterate(...)

those new loops make tile iterations whits save lot of "*" operations
inside orginal loops.

This code port tile api only with new iterate loops, don't tuch rest of
orginal map api.

Rafal

tile_api.diff.bz2
Description: tile_api.diff.bz2