Default Initialising m_SAAbsorptionAttributes

In case booting on an older save/version<4  (not so far)

Or when saving after, crash due to NullException

(Will occurs too in BaseWeapon&BaseArmor with version<5 but is it really important ^^)
Merge pull request #7 from frkdom/patch-4

Default Initialising m_SAAbsorptionAttributes