Core/Units: ported power type updates from master branch

src/server/scripts/Spells/spell_priest.cpp

@@ -128,7 +128,7 @@ class PowerCheck
         bool operator()(WorldObject* obj) const
         {
             if (Unit* target = obj->ToUnit())
-                return target->getPowerType() != _power;
+                return target->GetPowerType() != _power;
 
             return true;
         }