Fixed entities not being added to pools in some scenarios

examples/simpleDrawing/init.lua

@@ -1,4 +1,4 @@
-local Concord = require("concord").init({
+local Concord = require("init").init({
    useEvents = true
 })
 local Entity    = Concord.entity

instance.lua

@@ -118,6 +118,13 @@ function Instance:addSystem(system, eventName, callback, enabled)
       }
    end
 
+   local e
+   for i = 1, self.entities.size do
+      e = self.entities:get(i)
+
+      self:checkEntity(e)
+   end
+
    return self
 end
 

system.lua

@@ -79,14 +79,10 @@ function System:__check(e)
          pool:add(e)
          self:entityAddedTo(e, pool)
          self:__tryAdd(e)
-
-         return true
       elseif poolHas and not eligible then
          pool:remove(e)
          self:entityRemovedFrom(e, pool)
          self:__tryRemove(e)
-
-         return false
       end
    end
 end