Worldmap rivers will not make you drown, and thus should also save poor alchemist & mage

git-svn-id: http://svn.net-core.org/repos/t-engine4@3843 51575b47-30f0-44d4-a5cc-537603b46e54

game/modules/tome/data/zones/wilderness/grids.lua

@@ -167,7 +167,6 @@ newEntity{
 	name = "deep water", image = "terrain/water_grass_5_1.png",
 	display = '~', color=colors.AQUAMARINE, back_color=colors.DARK_BLUE,
 	always_remember = true,
-	air_level = -5, air_condition="water",
 	can_encounter="water", equilibrium_level=-10,
 }
 newEntity{ base = "WATER_BASE", define_as = "WATER_BASE_DEEP", can_pass = {pass_water=1}, does_block_move = true }