[CRASH 0.9.12c] - Heavy Strike Animation Exception if Main hand is a Claw

To use heavy strike you must be using an mace, axe, sword, or two-handed weapon. However it is not required for this weapon to be in your main hand. Therefore I had my claw on my main hand.

(Very low level new character, just equipping whatever causes the most bludgeoning xD)

So basically, if you try to use Heavy Strike while your mainhand weapon is a claw, and your off-hand weapons a one-hand mace, axe, or sword (Just something so you can use the skill) the game crashes with the following dialog box.

TITLE: Exception
BODY: Trying to play an animation that doesn't exsist or otherwise has an invalid index"
BUTTONS: OK, and CLOSE.