[Freeciv-Dev] tiny patch towards terrain dishardwirening

[Tomasz Wegrzanowski <maniek@xxxxxxxx>]

Patch introduces two functions to common/map.[hc]

First is : is_ocean (x,y)
Second is : is_land (x,y)

They says if terrain is ok for sea / land units to be as-is
(w/o transporters or cities)

1)
When dishardwiring terrain types, much work would be land/ocean problem.
Changing (t==T_OCEAN) to (terrain_flags(t)&TF_OCEAN) in one place is simpler

2)
if we will introduce posibility that both land and sea units can
be on te same tile type (T_FJORD, even T_RIVER etc.), having function
`is_land(x,y)' instead of `!is_ocean(x,y)' will help.

is_ocean.diff
Description: Text document