Fix crash when creating a save game

This was caused by broken serialization functions which have been
introduced by the big refactor from closure based oop to middleclass.

Fixes #225.

Author: rm-code

src/items/weapons/RangedWeapon.lua

@@ -33,16 +33,10 @@ function RangedWeapon:attack()
 end
 
 function RangedWeapon:serialize()
-    local t = {
-        ['id'] = self.template.id,
-        ['itemType'] = self.template.itemType,
-        ['modeIndex'] = self:getAttackModeIndex()
-    }
-
+    local t = RangedWeapon.super.serialize( self )
     if self.magazine then
         t['magazine'] = self.magazine:serialize()
     end
-
     return t
 end
 

src/items/weapons/Weapon.lua

@@ -42,11 +42,8 @@ function Weapon:selectPrevFiringMode()
 end
 
 function Weapon:serialize()
-    local t = {
-        ['id'] = self.id,
-        ['itemType'] = self.itemType,
-        ['modeIndex'] = self.modeIndex
-    }
+    local t = Weapon.super.serialize( self )
+    t['modeIndex'] = self.modeIndex
     return t
 end