Echo signal should not stop on Lakes

[hekow]

When we echo on a lake, it return found ground at 0 range.
But in reality there is nothing to stop the signal, so it should keep going.

In order to obtain this behavior there is only one line to change:
line 262 of Game.scala
if (! biomes.contains(Biomes.OCEAN)) {
//stop
to
if (! biomes.contains(Biomes.OCEAN)&&! biomes.contains(Biomes.LAKE) {

[mosser]

Thanks for reporting this bug. I'll fix it in the next sprint dedicated to Island, not before this summer. Your fix seems to do the job, but as this feature os part of the engine it must be carefully tested. We need to exhibit a unit test that reproduce the issue (which might actually be more complicated that fixing the code) to ensure that the action behavior is the right one and will not trigger any side effects.