fix %powerType always shows the primary unitPowerType even if another powerType is selected

[Boneshockx]

Description

%powertype shows the wrong number when we select a different-from-primary power type in the trigger.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested

Be on any class with multiple power types (e.g. Warlock).
Select a power trigger for player, select Soul Shards.

Expected result:
%powertype = 7 (soulshards)

Actual result:
%powertype = 0
print(UnitPowerType("player")) = 0 (mana)