Returns 1 if the specified animation action exists for the player.
The result of this trigger is undefined if the player has been placed in a custom state by a successful hit. In this situation, use SelfAnimExist.
Format: AnimExist(exprn)
Arguments:
Return type: boolean (0 if false or 1 if true)
Error conditions: Returns 'Bottom' if exprn evaluates to 'Bottom'.
Example:
trigger1 = !AnimExist(200)
; Triggers if the player is missing action 200.