Restrict power updates in OvalePower to valid power types.
Restrict power updates in OvalePower to valid power types.

The UNIT_POWER event fires for other power types that aren't tracked by
OvalePower, e.g., COMBO_POINTS.  Ignore these power types so they don't
trigger a loop update over all power types.

ultijlam/ovale,eXhausted/Ovale,ultijlam/ovale,eXhausted/Ovale,ultijlam/ovale,eXhausted/Ovale,Xeltor/ovale