mcl_mobs: when moving away from dangers, check if destination is dangerous itself

mods/ENTITIES/mcl_mobs/api.lua

@@ -2026,7 +2026,7 @@ local do_states = function(self, dtime)
 
 		elseif self.fire_damage > 0 then
 
-			lp = minetest.find_node_near(s, 1, {"group:fire"})
+			lp = minetest.find_node_near(s, 1, {"group:fire", "mcl_nether:magma"})
 
 		end
 
@@ -2041,6 +2041,26 @@ local do_states = function(self, dtime)
 
 				-- did we find land?
 				if lp then
+					local nn = minetest.get_node(lp).name
+					if is_node_dangerous(self, nn) then
+						-- is the chosen destination safe? Retry if not (max 10 iterations)
+						local i = 0
+						while i < 10 do
+							if lp then
+								nn = minetest.get_node(lp).name
+								minetest.log("Found solid block: " .. nn)
+								if not is_node_dangerous(self, nn) then break
+							end
+							-- look for solid node 5 blocks around the mob's position
+							elseif i < 5 then
+								lp = minetest.find_node_near(s, 5, {"group:solid"})
+							-- after 5 iterations double search radius
+							elseif i < 10 then
+								lp = minetest.find_node_near(s, 10, {"group:solid"})
+							end
+							i = i + 1
+						end
+					end
 
 					local vec = {
 						x = lp.x - s.x,