Fixed the extra flight penalty while carrying a fish

I fixed a problem that made Aurelie lose too much lift after catching a fish. Carrying it still adds weight, but the empty-claw extension penalty no longer builds up on top of that load.

The change keeps the effort of flying with a catch while removing the extra penalty.

“The catch should add weight without silently doubling the penalty.”

The clip starts with a fish already picked up and Aurelie positioned above the lake. I use repeated powered wingbeats to show the carried load in flight; this is a separate demonstration from the fish-catching clip.