Only raise onCardStrengthChanged if strength is not set (#1932)
Only raise onCardStrengthChanged if strength is not set (#1932)

Previously, Randyll Tarly with Strangler could stand after modifying his strength through for example Wardens of the South. This PR fixes that by only raising the event if the character's strength is not set.
cryogen/throneteki,DukeTax/throneteki,cryogen/throneteki,DukeTax/throneteki,ystros/throneteki