Make sure getModifiedItemAttr always returns an int, unless otherwise wanting None

In py2, you could compare None to an int and it would always be less than. Unfortunately in py3, this is no longer the case. Returning getModifiedItemAttr as 0 allows us to not do a huge refactor.

eos/saveddata/module.py

@@ -213,7 +213,7 @@ class Module(HandledItem, HandledCharge, ItemAttrShortcut, ChargeAttrShortcut):
         armorRep = self.getModifiedItemAttr("armorDamageAmount") or 0
         shieldRep = self.getModifiedItemAttr("shieldBonus") or 0
         if not cycles or (not armorRep and not shieldRep):
-            return None
+            return 0
         hp = round((armorRep + shieldRep) * cycles)
         return hp